After Succeeding, Young Tycoons Try, Try Again (NY Times)

"He thought he would spend the time after the sale “exploring my inner self.” Instead, he spent the better part of 12 months “feeling worthless and stupid” and baffled by what he might do with the remainder of his life. He felt too young to retire or downshift a gear or two — and too restless to become a philanthropist."

“I’d run any company; it’s completely irrelevant to me,” Mr. Levchin said. “It’s really about this drive to win.”