Bitcoin mining landscape shifting: North American mining pools experienced a notable contraction in 2025, with their block share declining from 40% to 35% year-to-date. The decline reflects a broader industry pivot, as mining firms increasingly redirect computational resources and capital toward AI infrastructure development. This reallocation signals changing priorities within the mining sector, balancing traditional BTC network security with emerging high-margin opportunities in the AI space. Market observers are closely tracking whether this trend will stabilize or accelerate further.