Bitcoin fell below $100,000 on Monday, hitting its lowest in 11 days, in a move analysts attributed to a wave of caution after the surging popularity of a Chinese artificial intelligence model sparked a selloff in Western AI-related stocks. The world's biggest cryptocurrency struggled to make gains last week, as a rally that had seen it break above $100,000 after U.S. President Donald Trump's election ran out of steam. At 1156 GMT, bitcoin was at $98,852.17, down around 6% on the day, having fallen sharply in early trading to hit its lowest since Jan. 16.