At Texas's AT&T Arena on Friday night, a trader on Polymarket who had made about $11 million betting on Donald Trump's return to the White House lost nearly a third of that amount after supporting a comeback that did not happen. For the bettor who had $3.6 million riding on the fight, YouTuber turned boxer Jake Paul's lackluster victory over a noticeably rusty Mike Tyson in Friday's overhyped Netflix spectacle was a crushing blow.