Bitcoin logs its second-ever negative year-over-year difficulty reading
Difficulty sits ~1.1% below its level a year ago — the only precedent is China's 2021 mining ban. This time the exodus is voluntary: capital and megawatts are walking to AI.
A structural, not cyclical, shift — when infrastructure leaves for a better-paying tenant, it doesn't come back on the next BTC rally.
Difficulty shrinks 14% from this year's high as plunging revenues force operators to pivot
With hashprice near $32/PH/day, Hashrate Index attributes the contraction to weak economics, AI/HPC expansion, Texas curtailments, Iran disruptions, and policy shocks across mining hubs.
The third-deepest difficulty drawdown of the ASIC era — only the China ban and the 2018 bear were steeper. Survivors gain block share at a discount.
Mining capitulation: difficulty falls 19.9% peak-to-now as miners pivot to AI
The latest retarget eased another ~0.7% as unprofitable rigs shut down; Bitcoin Magazine Pro counts 287 straight days of hashrate downtrend from the 1 ZH/s peak.
Capitulation phases historically mark accumulation zones — but the AI bid for power makes this cycle's supply response different from every prior one.