It feels as if it should be illegal to even think about heating appliances during the height of summer—seriously, these heat waves in New York have been brutal—but we need to talk about heat pumps.
The appliances use electricity for heating, they’re incredibly efficient, and they’re on the rise. (For what it’s worth, many heat pumps can also be run in reverse to cool buildings.) In the US, heat pump sales have doubled over the past 15 years, according to a new report. And they’re winning the heating race against fossil fuels, outpacing natural-gas furnaces by 32% during the first quarter of 2026.
These stats are especially striking at this moment, because a key tax credit for heat pumps just ended with the close of 2025. But you wouldn’t know it from looking at the data. Why are heat pumps still so hot?
In case you need a quick refresher, heat pumps use electricity to essentially move heat from one spot to another. A refrigerant moves around a loop in the device, expanding and compressing, gathering and releasing heat at different points in the cycle. (For a more in-depth look at the thermodynamics, this explainer I wrote in 2023 still holds up.)
The result is an appliance that can be incredibly efficient. Once you pay for and install a heat pump, it’s generally significantly cheaper to run than a gas or oil furnace or other types of electric heating systems. And because they’re more efficient and don’t involve burning fossil fuels, heat pumps can be a major help in decarbonizing buildings.
One of the major hurdles to wider use of heat pumps is the appliances’ cost: They tend to be more expensive to buy and install than gas furnaces. For this reason, many governments offer incentives to encourage their adoption. In the US, people who installed heat pumps between 2023 and 2025 were eligible for up to $2,000 in tax credits.
Last year, though, the Trump administration slashed those tax credits, along with many of the other incentives that were part of the 2022 Inflation Reduction Act. Effective January 1, 2026, no more financial help for heat pumps.
I think I’ve seen this film before, and I didn’t like the ending. Tax credits of up to $7,500 for new EVs ended on September 30, 2025. In the quarter leading up to that deadline, sales spiked as people rushed to take advantage of the incentive. Then they fell off a cliff. Things are starting to normalize now, but clearly the tax credit’s sunset had a major effect.
But as it turns out, heat pumps are an entirely different story. In the first few months of 2026, sales have actually gone up, as Lucas Davis, an energy economist and UC Berkeley professor, points out in a new analysis.
Heat pump shipments were flat from December to January and have seen a gradual rise since then, according to data from the Air Conditioning, Heating, and Refrigeration Institute, a trade group that represents about 90% of the US market. This increase from winter into spring follows a seasonal trend seen in previous years—and it’s actually a bit stronger in 2026.
This data isn’t what you’d expect to see if losing the tax credit were hurting demand. As Davis lays out in his post, it seems the credit wasn’t really convincing people to install heat pumps, or at least the case for doing so was sufficient without the added incentive.
“It appears that the U.S. market for heat pumps is strong enough that it does not depend on tax credits,” Davis writes.
In 2024, MIT Technology Review put heat pumps on our annual list of breakthrough technologies. “We’ve entered the era of the heat pump,” I wrote at the time.
While heat pump sales have been up and down over the last few years, the era is going strong. The appliances have outsold gas furnaces in the US for the last four years. It’s not just the US, either. Countries including China and Germany have seen strong movement to heat pumps in recent years.
There’s rarely a straight path to adoption for new technology, especially something that requires so many individual households to make a significant change. But it’s encouraging that a major decarbonization tool is going strong, even when roadblocks pop up.
This article is from The Spark, MIT Technology Review’s weekly climate newsletter. To receive it in your inbox every Wednesday, sign up here.
CleanSpark, the Nasdaq-listed bitcoin miner, said on July 14 that it has signed a 20-year infrastructure lease with an unnamed high-investment-grade global technology company at its campus in Sandersville, Georgia.
The deal marks the firm’s largest step from pure bitcoin mining toward high-performance computing for hyperscale clients.
The lease covers data center infrastructure that will support 175 megawatts of critical IT load. CleanSpark expects the initial term to generate $6.6 billion in contracted revenue, a figure that would climb to $11.6 billion if the tenant exercises both extension options.
The company has recently announced that it would repurpose part of its electricity capacity and mining infrastructure to power AI data centers, aiming to diversify beyond bitcoin mining.
CleanSparks’ average annual net operating income from the agreement should reach $330 million. First deliveries are due in the fourth quarter of 2027.
In a further sign of the tenant’s appetite, the two sides executed a letter of intent and an exclusivity arrangement covering CleanSpark’s entire Texas portfolio, a base of up to 885 megawatts of secured and planned power capacity. Should that convert into firm contracts, CleanSpark’s transition into an infrastructure landlord for artificial-intelligence and cloud workloads would deepen.
CleanSpark holds 13,924 bitcoin
The announcement lands as CleanSpark’s core mining business posts records. The company produced 614 bitcoin in early July and lifted its operational hashrate to 50 exahashes per second, a company high.
Treasury holdings rose to 13,924 bitcoin, one of the larger corporate stashes among public miners. Management has kept much of its mined bitcoin rather than sell into the market, a bet on the asset’s long-term price.
Wall Street has warmed to the compute pivot. Citizens began coverage with an Outperform rating and a $27 price target, citing the shift toward hyperscale compute capacity. Chardan lifted its target to $19 from $16 and kept a Buy rating. Both notes framed the Sandersville lease as proof that CleanSpark can monetize its power and land assets beyond mining, where margins swing with bitcoin’s price and network difficulty.
Investor reaction has been mixed. Shares of CleanSpark gained more than 20% in pre-market on the news but have since dropped to 9% gains on the day.
The Georgia lease offers somewhat of a hedge. Contracted rent from a creditworthy tenant provides a revenue stream that does not rise and fall with hash prices, while the company keeps its mining fleet and bitcoin treasury intact.
The next test is execution: bringing 175 megawatts online before the close of 2027 and turning the Texas letter of intent into signed leases.
MakerDAO’s Endgame transition has always been ambitious, and at times difficult to follow. The latest discussions around Spark rollout mechanics and token distribution help make the restructuring feel more concrete, especially for users trying to understand where DAI and the broader Maker ecosystem are heading.
That matters because Maker is not just another DeFi protocol. It is one of the oldest and most important stablecoin systems in crypto.
For more details, visit the official Forum platform.
The plan affects how users understand DAI, Spark, and future protocol incentives.
It shows Maker’s long-running rebrand and restructuring effort is moving closer to execution.
Why The Rebrand Is Complicated
Maker’s challenge is that it has a deeply recognized product in DAI and a complex governance structure behind it. Changing the brand, incentives, or token architecture risks confusing users even if the long-term plan is designed to improve growth.
Spark sits inside that transition as a key part of the protocol’s future strategy. The more detailed the rollout mechanics become, the easier it is for users and governance participants to judge what is actually changing.
Stablecoin Identity Matters
Stablecoins rely on trust, familiarity, and liquidity. Any shift in branding or structure has to be handled carefully because users do not want uncertainty around the asset they treat as a base unit.
That is why Maker’s Endgame process is so important. It is trying to evolve without breaking the confidence that made DAI meaningful in the first place.
What Governance Has To Solve
The key question is whether Maker can make the new structure feel simpler rather than more complicated. Token rollouts, yield products, and governance incentives can add value, but they can also overwhelm ordinary users.
For now, the SPARK discussion shows that the Endgame roadmap is becoming more operational. The execution phase is where the market will find out whether the plan can actually work.
The Part That Matters
The useful way to read this story is not as a standalone headline about MakerDAO, but as part of the wider pressure building around Stablecoins coverage this week. Markets have been jumping quickly from one catalyst to the next, so the cleaner value for readers is in separating the actual development from the instant reaction around it. In this case, the source material gives us a concrete event to work from, rather than a loose rumour or a recycled social-media talking point.
That distinction matters because crypto readers are being asked to process a lot at once: ETF flows, regulatory actions, exchange listings, protocol upgrades, wallet movements, and political signals. A story like this is most useful when it helps them understand where DAI fits into that broader map. It does not need to be inflated into a guaranteed price call to be worth covering. It simply needs to explain what changed, who is affected, and why the market is paying attention today.
The caveat is also important. Even clean source-backed developments can be overinterpreted when traders are hunting for a fast narrative. A listing does not automatically create lasting demand, a regulatory update does not immediately settle every legal question, and an on-chain movement does not always translate into a finished sale. The better read is to treat the development as a fresh data point and then watch whether follow-up activity confirms the direction of travel.
For Bitcoinist readers, that means keeping the focus on what can actually be verified from the source and avoiding the temptation to turn every update into a sweeping market verdict. The story is strong enough on its own terms: it gives investors and traders another piece of context around Stablecoins, while leaving room for the next filing, dashboard update, wallet movement, governance vote, or exchange notice to decide whether the angle grows into something bigger.
This article is based on MakerDAO governance materials.
This article was written by the News Desk and edited by Samuel Rae.
This report is based on information from Forum. at Forum
Meta's pitch to users is Spark's ability to handle large agentic workloads, fix bugs, and help with large code migrations — the kind of automation that enterprises are increasingly turning to AI companies to provide.
I was really looking forward to July 4, and not just because I love a poolside barbecue. This year the American holiday also marked a big symbolic deadline for US nuclear power.
Last year the Trump administration set a goal to see three new microreactors achieve criticality, a technical milestone establishing that a reactor can sustain a chain reaction, by the nation’s 250th birthday. And just in time, four reactors did so.
It was a lofty goal, and seeing not just three but four companies meet it is certainly a positive sign for emerging nuclear technologies at a time when the world is facing increased need to increase electricity supply and address climate change with emissions-free technologies.
But achieving criticality doesn’t mean a reactor is ready to provide electricity for the grid (or at all, for that matter). Let’s untangle what this program’s success could mean for nuclear power in the US, and where these companies might go from here.
The Reactor Pilot Program essentially opened a special door for prototype reactors to fast-track development. In August, the US Department of Energy selected 11 reactor projects for the program and offered them land and support from the national labs system. These are all microreactors; the large light-water reactors that dominate the grid today are tens or even hundreds of times their size.
Antares Nuclear was the first to achieve criticality, reaching the milestone in June in its Mark-0 test reactor. Reactors from Valar Atomics, Deployable Energy, and Aalo Atomics followed. (Aalo hit the mark in the early hours of July 4—an inspiring example of just barely meeting a deadline.)
The speed with which these companies hit this milestone is impressive, especially in an industry known for massive projects that frequently blow past deadlines and stated budgets. (Valar, Antares, and Aalo were all founded in 2023, and Deployable started in 2025.) But reaching criticality and running a reactor that can produce electricity are two totally different things.
All these reactors reached what’s called zero-power criticality. Basically, it’s a test of whether you can start a nuclear chain reaction, with no meaningful power coming from the reactor. “A zero-power-criticality test can be achieved without making real engineering progress on fuel or design,” Kathryn Huff, a former assistant secretary for nuclear energy and chair of the Department of Nuclear Engineering and Engineering Physics of the University of Wisconsin–Madison, said on an episode of the Catalyst podcast earlier this year.
Now, with the completion of this program, the companies will need to continue their work to make power, which could involve some big technical challenges. In some cases they’ll need to add significant equipment, like the cooling systems to transfer the heat out of the reactor core.
The companies are projecting aggressive timelines moving forward. Aalo says it’s already begun work on the second reactor and plans to produce 10 megawatts of electricity to power an on-site data center in 2027. Deployable Energy says it plans to deploy commercial reactors by 2028.
I tend to take timelines from startups, especially in nuclear, with a grain of salt. Not only are these remarkably complex technical machines, but companies often run into problems outside their own control, like regulatory challenges—which these new projects could soon face.
The Nuclear Regulatory Commission is in charge of civilian and commercial nuclear use in the US, and historically, the process to get nuclear reactors approved has been quite slow.
The agency did propose a new framework for microreactor approvals earlier this year, which is designed to speed up the process—but it’s yet to be seen how quickly things will move. (And it’s worth noting here that some nuclear experts have questioned whether the agency under the Trump administration is loosening nuclear rules too much.)
Some nuclear supporters aren’t applauding the microreactor milestone. Federal focus on the program is an “unhelpful diversion” from goals to meaningfully increase nuclear capacity, according to one analysis by Third Way, a public policy think tank. “Artificially accelerating project timelines is a short-term solution, not a long-term fix,” the memo reads.
Criticality is a big first step, but a lot will still have to happen for any of these microreactors to come online, much less for these small reactors to be a significant source of electricity for the grid.
This article is from The Spark, MIT Technology Review’s weekly climate newsletter. To receive it in your inbox every Wednesday, sign up here.
MakerDAO’s roadmap has sometimes felt like a maze of names, tokens, and governance layers. The SPARK distribution plan helps make one piece of that transition easier to see: how users and early participants may be rewarded.
The useful way to read this is not as a guaranteed price signal, but as a fresh piece of information in a market that is trying to sort real developments from noise. For MakerDAO, that is especially important because the Endgame transition touches one of DeFi’s most important stablecoin ecosystems. Clear incentives can make the move feel organized. Confusing incentives can do the opposite.
For more details, visit the official Forum platform.
TL;DR
MakerDAO outlined SPARK token distribution mechanics.
The plan gives more detail on incentives around Spark Protocol participation.
It brings the broader Endgame transition closer to concrete user-facing changes.
Why distribution details matter
Token distribution is where abstract governance design becomes personal. Users want to know who gets what, why they qualify, and whether the new structure rewards the behaviour the protocol wants to encourage.
For MakerDAO, that is especially important because the Endgame transition touches one of DeFi’s most important stablecoin ecosystems. Clear incentives can make the move feel organized. Confusing incentives can do the opposite.
The Market Read
Keep this version user/incentive focused, not just governance-process focused.
That is the balance readers need to keep in mind. Crypto markets are quick to turn every update into a single-direction trade, but most durable stories are more layered than that. They matter because they change positioning, incentives, infrastructure, or regulation over time.
What Comes Into Focus Now
From here, the important thing is follow-through. If the source data, company update, filing, or on-chain record continues to move in the same direction, this can become part of a larger trend. If it stalls, it is still useful as a snapshot of where attention is sitting today.
For traders and readers, the cleaner takeaway is to separate the confirmed development from the speculation around it. The confirmed part is what deserves coverage. The speculation is what needs caution.
For Stablecoins readers specifically, the story is useful because it gives a clearer frame for the next few sessions. It tells them what to watch, which part of the market is reacting, and where the first obvious risk sits. That is more valuable than simply saying a token, company, or regulator has made a move. The useful work is in connecting the update to liquidity, positioning, adoption, enforcement, or user behaviour without pretending that any single headline controls the whole market.
The practical question now is whether this remains an isolated update or becomes part of a chain of follow-through. A second filing, another wallet move, fresh dashboard data, a new governance vote, or a stronger market reaction can all turn a clean single-day story into a broader narrative. Without that follow-through, it still matters, but more as a marker of where attention was concentrated on July 8 than as a complete trend on its own.
That distinction is especially important in a market where headlines can travel faster than context. A source-backed update gives readers something firmer to work with, but it does not remove liquidity risk, execution risk, or the chance that traders fade the initial reaction once the first wave of attention passes.
In that sense, the headline is only the starting point. The better read is to watch how builders, exchanges, funds, wallets, regulators, or large holders respond after the first announcement has moved through the feed.
This report is based on information from forum.makerdao.com.
This article was written by the News Desk and edited by Samuel Rae.
MakerDAO’s roadmap has sometimes felt like a maze of names, tokens, and governance layers. The SPARK distribution plan helps make one piece of that transition easier to see: how users and early participants may be rewarded.
The useful way to read this is not as a guaranteed price signal, but as a fresh piece of information in a market that is trying to sort real developments from noise. For MakerDAO, that is especially important because the Endgame transition touches one of DeFi’s most important stablecoin ecosystems. Clear incentives can make the move feel organized. Confusing incentives can do the opposite.
For more details, visit the official Forum platform.
TL;DR
MakerDAO outlined SPARK token distribution mechanics.
The plan gives more detail on incentives around Spark Protocol participation.
It brings the broader Endgame transition closer to concrete user-facing changes.
Why distribution details matter
Token distribution is where abstract governance design becomes personal. Users want to know who gets what, why they qualify, and whether the new structure rewards the behaviour the protocol wants to encourage.
For MakerDAO, that is especially important because the Endgame transition touches one of DeFi’s most important stablecoin ecosystems. Clear incentives can make the move feel organized. Confusing incentives can do the opposite.
The Market Read
Keep this version user/incentive focused, not just governance-process focused.
That is the balance readers need to keep in mind. Crypto markets are quick to turn every update into a single-direction trade, but most durable stories are more layered than that. They matter because they change positioning, incentives, infrastructure, or regulation over time.
What Comes Into Focus Now
From here, the important thing is follow-through. If the source data, company update, filing, or on-chain record continues to move in the same direction, this can become part of a larger trend. If it stalls, it is still useful as a snapshot of where attention is sitting today.
For traders and readers, the cleaner takeaway is to separate the confirmed development from the speculation around it. The confirmed part is what deserves coverage. The speculation is what needs caution.
For Stablecoins readers specifically, the story is useful because it gives a clearer frame for the next few sessions. It tells them what to watch, which part of the market is reacting, and where the first obvious risk sits. That is more valuable than simply saying a token, company, or regulator has made a move. The useful work is in connecting the update to liquidity, positioning, adoption, enforcement, or user behaviour without pretending that any single headline controls the whole market.
The practical question now is whether this remains an isolated update or becomes part of a chain of follow-through. A second filing, another wallet move, fresh dashboard data, a new governance vote, or a stronger market reaction can all turn a clean single-day story into a broader narrative. Without that follow-through, it still matters, but more as a marker of where attention was concentrated on July 8 than as a complete trend on its own.
That distinction is especially important in a market where headlines can travel faster than context. A source-backed update gives readers something firmer to work with, but it does not remove liquidity risk, execution risk, or the chance that traders fade the initial reaction once the first wave of attention passes.
In that sense, the headline is only the starting point. The better read is to watch how builders, exchanges, funds, wallets, regulators, or large holders respond after the first announcement has moved through the feed.
This report is based on information from forum.makerdao.com.
This article was written by the News Desk and edited by Samuel Rae.
MakerDAO’s Endgame plan can sound abstract until the token mechanics start to appear. The SPARK rollout discussion gives the market something more concrete to evaluate: distribution, incentives, and how Spark Protocol participants may fit into the new structure.
The useful way to read this is not as a guaranteed price signal, but as a fresh piece of information in a market that is trying to sort real developments from noise. For MakerDAO, the challenge is making a complex restructuring feel coherent. DAI, Spark, governance, and future token paths all need to connect in a way that users can follow. This proposal is another attempt to make that transition legible.
For more details, visit the official Forum platform.
TL;DR
MakerDAO outlined mechanics for SPARK token rollout and distribution.
The plan gives governance participants more detail on how Spark Protocol incentives may work.
It is another step in MakerDAO’s broader Endgame transition.
Why token mechanics matter
Governance transitions succeed or fail partly on whether users understand what they are getting and why it matters. Token rollout plans are not just admin. They shape incentives, participation, and the way liquidity moves between products.
For MakerDAO, the challenge is making a complex restructuring feel coherent. DAI, Spark, governance, and future token paths all need to connect in a way that users can follow. This proposal is another attempt to make that transition legible.
The Market Read
Focus on clarity and incentives, not just token excitement.
That is the balance readers need to keep in mind. Crypto markets are quick to turn every update into a single-direction trade, but most durable stories are more layered than that. They matter because they change positioning, incentives, infrastructure, or regulation over time.
What Comes Into Focus Now
From here, the important thing is follow-through. If the source data, company update, filing, or on-chain record continues to move in the same direction, this can become part of a larger trend. If it stalls, it is still useful as a snapshot of where attention is sitting today.
For traders and readers, the cleaner takeaway is to separate the confirmed development from the speculation around it. The confirmed part is what deserves coverage. The speculation is what needs caution.
For DeFi readers specifically, the story is useful because it gives a clearer frame for the next few sessions. It tells them what to watch, which part of the market is reacting, and where the first obvious risk sits. That is more valuable than simply saying a token, company, or regulator has made a move. The useful work is in connecting the update to liquidity, positioning, adoption, enforcement, or user behaviour without pretending that any single headline controls the whole market.
The practical question now is whether this remains an isolated update or becomes part of a chain of follow-through. A second filing, another wallet move, fresh dashboard data, a new governance vote, or a stronger market reaction can all turn a clean single-day story into a broader narrative. Without that follow-through, it still matters, but more as a marker of where attention was concentrated on July 8 than as a complete trend on its own.
That distinction is especially important in a market where headlines can travel faster than context. A source-backed update gives readers something firmer to work with, but it does not remove liquidity risk, execution risk, or the chance that traders fade the initial reaction once the first wave of attention passes.
In that sense, the headline is only the starting point. The better read is to watch how builders, exchanges, funds, wallets, regulators, or large holders respond after the first announcement has moved through the feed.
This report is based on information from forum.makerdao.com.
This article was written by the News Desk and edited by Samuel Rae.
MakerDAO’s Endgame plan can sound abstract until the token mechanics start to appear. The SPARK rollout discussion gives the market something more concrete to evaluate: distribution, incentives, and how Spark Protocol participants may fit into the new structure.
The useful way to read this is not as a guaranteed price signal, but as a fresh piece of information in a market that is trying to sort real developments from noise. For MakerDAO, the challenge is making a complex restructuring feel coherent. DAI, Spark, governance, and future token paths all need to connect in a way that users can follow. This proposal is another attempt to make that transition legible.
For more details, visit the official Forum platform.
TL;DR
MakerDAO outlined mechanics for SPARK token rollout and distribution.
The plan gives governance participants more detail on how Spark Protocol incentives may work.
It is another step in MakerDAO’s broader Endgame transition.
Why token mechanics matter
Governance transitions succeed or fail partly on whether users understand what they are getting and why it matters. Token rollout plans are not just admin. They shape incentives, participation, and the way liquidity moves between products.
For MakerDAO, the challenge is making a complex restructuring feel coherent. DAI, Spark, governance, and future token paths all need to connect in a way that users can follow. This proposal is another attempt to make that transition legible.
The Market Read
Focus on clarity and incentives, not just token excitement.
That is the balance readers need to keep in mind. Crypto markets are quick to turn every update into a single-direction trade, but most durable stories are more layered than that. They matter because they change positioning, incentives, infrastructure, or regulation over time.
What Comes Into Focus Now
From here, the important thing is follow-through. If the source data, company update, filing, or on-chain record continues to move in the same direction, this can become part of a larger trend. If it stalls, it is still useful as a snapshot of where attention is sitting today.
For traders and readers, the cleaner takeaway is to separate the confirmed development from the speculation around it. The confirmed part is what deserves coverage. The speculation is what needs caution.
For DeFi readers specifically, the story is useful because it gives a clearer frame for the next few sessions. It tells them what to watch, which part of the market is reacting, and where the first obvious risk sits. That is more valuable than simply saying a token, company, or regulator has made a move. The useful work is in connecting the update to liquidity, positioning, adoption, enforcement, or user behaviour without pretending that any single headline controls the whole market.
The practical question now is whether this remains an isolated update or becomes part of a chain of follow-through. A second filing, another wallet move, fresh dashboard data, a new governance vote, or a stronger market reaction can all turn a clean single-day story into a broader narrative. Without that follow-through, it still matters, but more as a marker of where attention was concentrated on July 8 than as a complete trend on its own.
That distinction is especially important in a market where headlines can travel faster than context. A source-backed update gives readers something firmer to work with, but it does not remove liquidity risk, execution risk, or the chance that traders fade the initial reaction once the first wave of attention passes.
In that sense, the headline is only the starting point. The better read is to watch how builders, exchanges, funds, wallets, regulators, or large holders respond after the first announcement has moved through the feed.
This report is based on information from forum.makerdao.com.
This article was written by the News Desk and edited by Samuel Rae.
Polymarket, the crypto-native prediction market, has begun supporting instant Bitcoin deposits over the Lightning Network. The feature uses infrastructure from Spark, a Bitcoin protocol built for payments and stablecoins.
In a post on X, Spark told users they can deposit BTC to the platform with more speed and more privacy than the older method offered.
The move extends a funding push that started in October 2025, when Polymarket switched on standard on-chain Bitcoin deposits. Those deposits carried a wait: most on-chain Bitcoin transactions need three to six confirmations, a window of 10 to 60 minutes, before a platform credits an account.
The on-chain route carried a higher minimum deposit, a reflection of bridging costs. For a trader who wants a position on a live market, both the delay and the fee are a cost.
Lightning and Spark close the gap. Spark validates a Bitcoin transaction at the moment it broadcasts, checking for double-spend risk, fee adequacy, and replace-by-fee flags.
JUST IN: The world's largest predictions market Polymarket now accepts Bitcoin Lightning deposits! pic.twitter.com/CxOObnbyJ2
— Bitcoin Magazine (@BitcoinMagazine) July 7, 2026
The protocol credits the deposit in under a second and absorbs the confirmation risk, a design Spark markets as zero-conf.
Polymarket does not have to manage confirmation thresholds or run its own Lightning nodes; a single Spark SDK handles on-chain, Lightning, and stablecoin rails.
Spark keeps deposits self-custodial. Each wallet ties to the user’s own keys, so the protocol, not Polymarket, carries the operational load, and users retain control of funds until a trade.
Spark counts wallet providers such as Breez, Xverse, and Cake among the teams building on the same rails, and Tether chief Paolo Ardoino has praised the protocol as a route to programmable Bitcoin over Lightning.
Polymarket’s boom over the years
Timing matters for a company in a growth phase.
Founded in 2020, Polymarket rose to prominence during the 2024 U.S. presidential election and has added Chainlink oracles, earnings markets, and a fresh contest with regulated rival Kalshi.
Faster, cheaper funding lowers the barrier for the Bitcoin holders who make up a large share of the crypto audience, and it hands Polymarket a fresh answer to a rival that has pressed it on volume.
Wavespace, a Bitcoin neobank serving the Eurozone, has announced MiCA compliance of its ‘self-custodial’ debit card. The young fintech company is at the cutting edge of Bitcoin payments technology in Europe, with support for the Lightning Network, and auto DCA to self-custody.
Debit cards in the Bitcoin and broader crypto industry have traditionally worked by preloading custodial accounts with bitcoin or stablecoins. The process of preloading was usually on-chain, taking time to settle and requiring manual input from the user to send from self-custody wallets or cold storage. If the preloaded balance ran out on the card, spending would not be possible.
Wavespace’s self-custody debit card solves these problems with a novel Bitcoin technology called Nostr Wallet Connect, or NWC for short. This protocol, documented in NIP-47, allows users to connect a service like this debit card to a self-hosted Lightning node. The user sets a minimum balance, say $200 and every time the user spends from the card via the VISA network, Wavespace pulls sats from the user’s self-custodial wallet to top up the card. This process minimizes custodial exchange risk while maximizing user exposure to the asset and automating away the friction to spend bitcoin.
NWC is a technology developed by the Nostr ecosystem, a high-tech niche within the Bitcoin industry that is branching out into social media and other communication protocols.
The Wavespace Neobank
As a high-tech neobank, Wavespace gives users a personal IBAN account, which they can send fiat to, to purchase Bitcoin. Their automated DCA services can be set to withdraw bitcoin upon purchase to a selected Bitcoin address.
The company is MiCA compliant, making it one of the few surviving Bitcoin exchanges in Europe, as the complicated crypto regulations came online.
On the privacy front, the deep Lightning network integration of Wavespace lets user get access to the banking system in a clear and compliant manner, without exposing all their payment data on the Bitcoin blockchain. Since Lightning payments are off-chain, there is no single public record that leaks user data; instead, transactions move through payment channels between various user services, leaving no obvious public trace. The result is a growing compromise between the high privacy, cypherpunk values that created the Bitcoin and crypto industry, while also unlocking access to the legacy financial system, and compliant integration with regulation-heavy areas like Europe.
In an interview with Bitcoin Magazine, Eivydas Račkauskas, Chief Orange Pill Giver at Wavespace, said that 70% of the payments made on the platform use the Lightning Network and that the company is looking into the ARK protocol for further self-custody-oriented payments integrations. He also revealed that the company is integrated with Lightspark and is ready for an expansion into the USA, though he did not reveal further details on the matter.
Wavespace has been almost entirely bootstrapped and self-funded, according to Račkauskas, except for an early Relai angel investor who supported them in 2025. They are currently in the middle of another fundraising round.
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