Bitcoin dipped under $73k today, down roughly 40% from the October 2025 high of $125k. Large holders sold over 50,000 BTC in the last two weeks causing steady selling pressure. Mining stocks took a hit with MARA, RIOT, and CLSK all dropping more than 10%. Profitability is at a 14-month low due to lower prices and high network difficulty. MicroStrategy also hit a 52-week low and their unrealized Bitcoin gains have shrunk to under 10%. The crypto drop tracks with a broader tech selloff fueled by concerns in the AI sector.