Bitcoin’s 30-day mean hash rate has fallen 19% since November 2025, dropping from 1,108 EH/s to 898 EH/s, marking the longest sustained decline in the network’s history. This downturn coincides with the largest capital migration ever staged by miners: public mining firms now hold over $70 billion in AI hosting contracts. Network difficulty has contracted 19.9% from its November 2025 peak, posting its first negative year-over-year reading since August 2021. Hut 8, Core Scientific, and TeraWulf have signed deals collectively worth tens of billions of dollars with Microsoft, CoreWeave, and Anthropic, with AI hosting reportedly paying up to 25 times more per megawatt than mining.
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