Portrait of a 29-year-old billionaire: Can Sam Bankman-Fried make his risky crypto business work?

    Roger Parloff for Yahoo Finance “I hope to never be as wrong as I was in that conversation,” says Adam Yedidia. He is reflecting on a chat he had with Sam Bankman-Fried, his close friend and former MIT classmate, in fall 2017. Bankman-Fried was then inviting Yedidia to join him in launching a trading firm…