Sam Bankman-Fried built a crypto empire. Then the exchange he founded collapsed, revealing that billions of dollars of customer money was missing. Bankman-Fried was charged with fraud, and his trial begins Oct. 3. In a new series from The Journal, WSJ’s Caitlin Ostroff explores Bankman-Fried meteoric rise, devastating fall and the trail that will determine his future.  Learn more about your ad choices. Visit megaphone.fm/adchoices