When former U.S. president Donald Trump promised a bitcoin conference on Saturday that if reelected he would fire Securities and Exchange Commission Chair Gary Gensler, a crypto skeptic, the crowd roared with delight. "Wow, I didn't know he was that unpopular," the Republican presidential nominee shouted over the cheers. Trump, who once derided cryptocurrencies as a "scam," is courting the industry and winning big checks from donors hoping he will swiftly end Gensler's crypto crackdown.