Bitcoin is trading in a tight $86,500–$90,000 band on December 31, with spot BTC at $88,700 (+0.9$90,000. The latest rejection near $90,000 followed a brief short-covering spike above$89,000 on Dec. 30, rather than fresh long demand. Holiday-thinned books amplify every order. U.S. trading venues show 24-hour BTC spot volume near $34 billion, down from peaks above$70 billion around the Octob ...