How Warren Buffett's son spent the $90,000 of Berkshire stock he got at 19—worth $200 million now: 'I don't regret it'

Rather than spending his Berkshire Hathaway stock inheritance on extravagant things (or allowing it to accrue in value), Warren Buffett's son says he used it to buy something "infinitely more valuable than money." And he has no regrets.