Today's biggest BTC options block trade: A big player sold 500 BTC September 18th $114k call options expiring tomorrow, earning about $1.7M. Tomorrow 2am, the Fed's FOMC interest rate decision (expected cut from 4.5% → 4.25%). Before major macro events, funds often close positions to hedge risks; if there's no rate cut or hints of economic concerns, the market could drop significantly. Betting on 'no big rally,' the odds are pretty good.