Bitcoin (BTC-USD) prices are tumbling after rallying above $45,000 on Tuesday, 2024's first trading day. This comes a week ahead of the Securities and Exchange Commission's (SEC) decision on whether to approve a spot bitcoin ETF. From the New York Stock Exchange, Yahoo Finance Reporter Madison Mills examines faltering cryptocurrency values ahead of the SEC's January 10 deadline. For more expert insight and the latest market action, click here to watch this full episode of Yahoo Finance Live. Editor's note: This article was written by Luke Carberry Mogan.