The case of Marathon Digital Holdings perfectly illustrates the ongoing transformation within the mining sector. MARA has broadened its crypto management strategy for 2026 by authorizing the sale of all Bitcoin<\/a> held on its balance sheet, including accumulated reserves, rather than just the year’s mined production. As of December 31, 2025, the company held 53,822 BTC<\/strong> valued at approximately $4.7 billion<\/strong>.<\/p>\n\n\n\n In February 2026, MARA signed an agreement with Starwood Digital Ventures<\/strong> to convert its US mining sites into data centers dedicated to AI and enterprise cloud computing. The partnership targets a short-term capacity of 1 gigawatt<\/strong>, with an ultimate goal of 2.5 gigawatts<\/strong>. The announcement caused MARA’s stock to surge by +17%<\/strong> in after-market trading.<\/p>\n\n\n\n MARA has also acquired a 64%<\/strong> stake in Exaion, positioning its energy sites as critical infrastructure for hyperscalers and AI companies struggling to secure large-scale power sources.<\/p>\n\n\n\n This evolution is not an isolated case. Core Scientific announced plans to monetize nearly all of its Bitcoin reserves in 2026 as part of a similar transition toward AI services and high-density colocation. The shift is structural: the April 2024 halving slashed miner rewards by half, squeezing margins to the point of forcing massive diversification. For those tracking these dynamics through a crypto trading lens, miner sell-offs remain one of the most closely monitored on-chain indicators of selling pressure.<\/p>\n\n\n\n