Major Bitcoin Mining Pools Adopt Stratum V2, Enhancing Profitability and Security

Major Bitcoin Mining Pools Transition to Stratum V2

Seven of the largest players in the Bitcoin mining sector, including Antpool, F2pool, and Foundry, have officially joined the Stratum V2 working group as of May 7, 2026. This transition marks a significant shift towards miner-controlled transaction selection, enhancing profitability by up to 7.4% through reduced latency and improved fee collection.

The Stratum V2 protocol, which replaces the outdated Stratum V1, was developed to address security vulnerabilities and inefficiencies. It introduces authenticated encryption and allows miners to create their own block templates, rather than relying on those provided by pools. This change is expected to improve efficiency, privacy, and security within the mining ecosystem.

“By maintaining Stratum V2 as a public, manufacturer-neutral specification, we eliminate compatibility barriers and allow the ecosystem to focus on improving efficiency, privacy, security, and miner autonomy, ultimately leading to higher profitability,” stated the working group.

As of now, Braiins Pool and DMND have already implemented Stratum V2 in production, with other pools expected to follow suit. The combined hashrate of the new members represents a significant portion of the global mining power, which is currently dominated by a few major pools.

Key Takeaways:

• Stratum V2 offers up to 7.4% higher profitability for miners.
• It allows miners to create their own block templates, enhancing autonomy.
• Seven major mining pools have joined the initiative, representing significant global hashrate.

Riot Platforms Continues BTC Sales Amid Market Changes

Riot Platforms has sold an additional 500 BTC valued at $38.24 million to NYDIG, continuing a trend of consistent sales by mining companies in 2026. This sale is part of a broader strategy to manage liquidity and operational costs in a fluctuating market.

The ongoing sales reflect the challenges faced by Bitcoin miners as they navigate profitability amidst rising operational costs and market volatility. Riot's decision to liquidate part of its holdings indicates a strategic pivot to ensure financial stability.

Key Takeaways:

• Riot Platforms sold 500 BTC for $38.24 million.
• This sale is part of a consistent pattern of BTC liquidation by mining firms in 2026.

Gustavo Petro Warns of Climate Risks from Fossil Fuel Mining

Colombian President Gustavo Petro has issued a stark warning regarding the environmental impact of Bitcoin mining powered by fossil fuels, suggesting it could lead to a global climate collapse. He emphasized the need for a shift towards renewable energy sources, particularly in countries like Paraguay and Venezuela, which have significant potential for green energy.

Petro highlighted Paraguay's position as the fourth-largest global hashrate holder, leveraging its abundant hydroelectric resources. In contrast, Venezuela's ongoing energy crisis has led to a ban on Bitcoin mining, despite its potential for utilizing unexploited clean energy.

“If virtual currencies rely on fossil fuels, global warming and climate collapse will ensue,” warned Petro.

Key Takeaways:

• Petro warns that fossil fuel-based Bitcoin mining risks climate collapse.
• Paraguay has significant potential for green energy mining.
• Venezuela's energy crisis has halted its mining activities.

Cipher Mining Shifts Focus to AI with $11.4 Billion Contracts

Cipher Mining is undergoing a radical transformation, moving away from Bitcoin mining to become a provider of AI infrastructure. The company has signed a significant 15-year lease agreement with a major cloud provider, projecting revenues of approximately $11.4 billion over the contract's duration.

As part of this shift, Cipher Mining plans to cease Bitcoin mining operations by mid-2027, redirecting its energy capacities towards data centers for hyperscalers. This strategic pivot reflects the growing demand for AI services and the declining profitability of traditional mining.

Key Takeaways:

• Cipher Mining is transitioning to AI services, ending Bitcoin mining by 2027.
• The company has secured a $11.4 billion contract with a cloud provider.
• Net losses have increased as the company invests in its new direction.

Bitdeer Reports Zero Bitcoin Holdings After Recent Sales

Bitdeer has reported that it currently holds no Bitcoin, having sold all 193.8 BTC mined in the week leading up to May 8. This marks a significant shift for the company, which has opted to liquidate its holdings rather than retain any mined assets.

The decision to sell all mined Bitcoin reflects the ongoing challenges faced by mining companies in maintaining profitability and managing operational costs in a volatile market environment.

Key Takeaways:

• Bitdeer has sold all 193.8 BTC mined recently, holding no Bitcoin assets.
• This decision highlights the challenges in the current mining landscape.

Sources:

• Die großen Bitcoin-Mining-Pools Foundry, Antpool und F2pool kündigen die Umstellung auf Stratum V2 an
• BTC-Miner beschleunigen KI-Strategie mit Milliarden-Deals und Hardware-Austausch in den neuesten Quartalsberichten
• Gustavo Petro warnt: Krypto-Mining mit fossilen Brennstoffen wird einen „Klimakollaps“ auslösen
• Cipher Mining Aktie: 11,4 Milliarden aus AI-Verträgen
• Bitcoin statt Energieverschwendung? Warum Finnland plötzlich zum Krypto Hotspot Europas wird
• Bitdeer hält derzeit weiterhin keine Positionen und hat in dieser Woche 193,8 BTC verkauft.