⦿ Executive Snapshot

• What: Seven of the largest bitcoin mining pools adopt the Stratum V2 protocol, enabling individual miners to select transactions for new blocks.
• Who: Foundry, AntPool, F2Pool, SpiderPool, MARA Pool, Block Inc, and DMND.
• Why it matters: This shift represents a significant decentralization in bitcoin mining, addressing concerns over centralized transaction selection and enhancing miner autonomy.

⦿ Key Developments

• Seven major mining pools representing nearly 75% of the global bitcoin hashrate have joined the Stratum V2 working group.
• Stratum V2 allows individual miners to construct their own block templates, shifting transaction selection from pool operators to miners.
• CoinShares estimates that up to 20% of miners are currently unprofitable, reflecting economic pressures in the mining sector.
• The network difficulty is set to rise on May 15 from 132.47T to 135.64T, indicating increasing operational challenges for miners.
• Foundry controls 34.2% of global bitcoin hashrate, while AntPool, F2Pool, and SpiderPool control 14.2%, 11.3%, and 10.5% respectively.

⦿ Strategic Context

• The adoption of Stratum V2 marks a pivotal moment in bitcoin mining, emphasizing the community's ongoing struggle with centralization and decision-making power.
• Historically, the concentration of hashrate among a few pools has raised concerns about the security and integrity of the bitcoin network, prompting the need for more decentralized protocols.

⦿ Strategic Implications

• The immediate consequence of this shift could lead to greater miner participation in transaction selection, potentially enhancing the security of the network.
• Long-term implications may include a more balanced ecosystem where individual miners regain agency, which could attract more participants to the mining space.

⦿ Risks & Constraints

• Regulatory scrutiny and potential technical challenges in transitioning from Stratum V1 to Stratum V2 could hinder broader adoption.
• The continued concentration of hashrate among a few pools remains a structural risk, as it could undermine the intended benefits of decentralization.

⦿ Watchlist / Forward Signals

• The successful rollout of Stratum V2 across the mining community will be crucial to watch, particularly as miners adapt to its implementation.
• Future developments in the mining landscape, including changes in profitability metrics and hashrate distribution, will signal the success or failure of this decentralization effort.