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Bitcoin Miner MARA jumps 17% after striking a deal with Starwood to build AI data centers

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Bitcoin Miner MARA jumps 17% after striking a deal with Starwood to build AI data centers

MARA Holdings shares jumped 17% after the bitcoin mining firm announced Thursday a partnership with Starwood Capital Group to build large data centers across its existing U.S. sites.

The agreement will convert select MARA locations, many of which were originally developed for Bitcoin mining, into facilities serving enterprise cloud and artificial intelligence customers.

Starwood, which manages more than $125 billion of assets, will lead design, construction and tenant sourcing through its data center arm, Starwood Digital Ventures. The partners expect to deliver about 1 gigawatt of computing capacity in the near term, with plans to scale beyond 2.5 gigawatts over time. The two firms will jointly finance and operate the projects.

The deal marks a major pivot for MARA.

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The company built its reputation as a bitcoin miner, but it controls sites with direct access to large power supplies. That access has become valuable as tech firms struggle to secure power for new AI data centers.

MARA’s move fits into the trend of a slew of bitcoin miners repurposing their infrastructure to meet increasing demand for artificial intelligence compute. The pivot began after Bitcoin’s recent halving cut miners’ rewards in half. With rising power costs, shrinking bitcoin price and intensifying competition for mining, miners’ profit margins have been squeezed, forcing most firms to diversify or completely pivot into hosting machines for AI firms.

Most recently, another bitcoin miner, Bitfarms (BITF), said that it is rebranding as Keel Infrastructure as part of its pivot from bitcoin mining to data center development for high-performance computing (HPC) and AI workloads.

However, for MARA, it’s not ditching its identity as a bitcoin mining company. In fact, its CEO, Fred Thiel, said in a shareholder letter that “Bitcoin remains a core pillar of MARA’s strategy.”

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“While the timing of a recovery in bitcoin prices is difficult to predict, our long-term conviction in the asset class remains unchanged,” Thiel added.

MARA has also reported fourth-quarter earnings, with revenues falling 6% to $202.3 million from $214.4 million in Q4 2024, citing a 14% decline in the average price of bitcoin mined over the quarter.

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Crypto World

Circle Reveals Plans for Native Arc Token

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Circle Reveals Plans for Native Arc Token

Circle is advancing its Arc blockchain project, with plans for a native token, according to CEO Jeremy Allaire.

Circle, one of the largest stablecoin issuers in the industry, is exploring the possibility of a native token for its Arc blockchain, according to the company’s chief executive Jeremy Allaire.

During the company’s Q4 2025 earnings call, Allaire said Circle is exploring a native token for the Arc blockchain and that the company is gaining a strong understanding of how it would work.

“We’re getting a very good understanding of how a token can play a key role in providing stakeholder incentives, governance, security, utility and other things on the Arc network,” Allaire said, though no timeline for a launch was revealed.

The company launched the public testnet for Arc in October 2025, with plans for a full mainnet release expected later this year.

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Circle announced Arc in August last year, designing the network specifically for issuing and transacting stablecoins. As The Defiant reported, the network would focus on faster settlement and lower transaction costs compared with existing public blockchains.

Kevin Lehtiniitty, CEO of Borderless.xyz, told The Defiant last year that the competition for the “stablecoin chain” just brings the industry back to fragmented payment systems with new branding. As Lehtiniitty explained, “The answer that does push open finance forward in my mind is connectivity and interoperability; not another chain or another token.”

This article was generated with the assistance of AI workflows.

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Buterin Outlines Ethereum’s Quantum Resistance Roadmap

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Buterin Outlines Ethereum’s Quantum Resistance Roadmap

Ethereum co-founder Vitalik Buterin has identified and proposed a plan to address four areas of the network that he sees as most quantum-vulnerable.

Quantum computing and crypto have been in the headlines recently as concerns mount over Bitcoin and other blockchains’ resistance to quantum-capable supercomputers.

Buterin posted his quantum resistance roadmap for Ethereum on Thursday, stating that the four areas are: validator signatures, data storage, user account signatures, and zero-knowledge proofs.

He said that replacing the current BLS (Boneh-Lynn-Shacham) consensus signatures with “Lean” quantum-safe hash-based signatures would fix that component. The tricky part is picking the right hash function, since this choice will likely stick around for a long time.

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“This may be ‘Ethereum’s last hash function’, so it’s important to choose wisely,” he said. 

Ethereum Foundation researcher Justin Drake proposed “Lean Ethereum,” a plan to make the network quantum-secure, in August 2025. 

Quantum safe data storage and accounts  

Regarding data storage, or “blobs”, Ethereum currently uses a system called KZG (Kate-Zaverucha-Goldberg) for storing and verifying data. 

The plan is to swap this out for STARKs (Zero-Knowledge Scalable Transparent Argument of Knowledge), which are quantum-resistant. “It’s manageable, but there’s a lot of engineering work to do,” said Buterin.

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Related: Buterin outlines 4-year roadmap to speed up and quantum-proof Ethereum

The third challenge is user accounts. Ethereum currently uses ECDSA (Elliptic Curve Digital Signature Algorithm) signatures, which are standard cryptographic keys. The fix is to upgrade the network so that accounts can use any signature scheme, including “lattice-based” quantum-resistant ones.

However, quantum-safe signatures are much heavier computationally and would consume more gas.

“The long-term fix is protocol-layer recursive signature and proof aggregation, which could reduce these gas overheads to near-zero,” he said. 

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Quantum-resistant proofs are very expensive 

Quantum-resistant proofs are extremely expensive to run onchain so “the solution again is protocol-layer recursive signature and proof aggregation,” said Buterin.

Instead of verifying every signature and proof individually onchain, a single master proof or “validation frame” would verify thousands of them at once, keeping costs near zero.

“This way, a block could ‘contain’ a thousand validation frames, each of which contains either a 3kB signature or even a 256kB proof,” he explained. 

Buterin floated the concept of a recursive-STARK-based bandwidth-efficient mempool in January. Source: ETHresearch

Buterin also commented on the Ethereum Foundation’s “Strawmap” on Thursday, stating that he expects to see “progressive decreases of both slot time and finality time.” 

Magazine: Bitcoin may take 7 years to upgrade to post-quantum: BIP-360 co-author

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