Bitcoin retreats to $80K as $87K cost basis caps $100K push

Bitcoin has slipped back to around $80,000 after its summer rebound faded, with the $100,000 barrier still out of reach. Buyers from the past two years hold an average cost basis of $87,000 or higher, a level that twice capped rallies this year and led to pullbacks of at least 25%. Bitcoin ETF holders average $81,500. Macro pressure is rising as AI stocks lag and Bitcoin stays tied to tech shares.