Challenging each other to cage fights, building apocalypse bunkers – the behaviour of today’s mega-moguls is becoming increasingly outlandish and imperialEven their downfalls are spectacular. Like a latter-day Icarus flying too close to the sun, disgraced crypto-god Sam Bankman-Fried crashed and burned this month, recasting Michael Lewis’s exuberant biography of the convicted fraudster – Going Infinite – into the story of a supervillain.