It is just after midnight in Hong Kong, and Sam Bankman-Fried stares at the trading data on his six monitors, watching a global cryptocurrency crash happening in real time.Mr. Bankman-Fried, a 29-year-old from California, often works around the clock, as he was on that May evening. He naps on a beanbag set up near his computer. A folded up blanket sits on the floor. He’s worth at least $8 billion, on paper.That is even after the downturn that started in the spring, where total global losses in the value of all cryptocurrency eventually topped $1.3 trillion. And as Mr. …
