Bitcoin miner economics remain subsidy-driven as daily fees fell to 2.443 BTC on April 8 and CoinWarz projected difficulty to drop 4.91% to 132.14 trillion on April 18. CoinShares said the weighted average public-miner cash production cost was about $79,995 per BTC in Q4 2025, leaving margins tight in a low-fee market. CoinShares also said listed miners have announced more than $70 billion in cumulative AI and HPC contracts and could derive as much as 70% of revenue from AI by year-end.