He's called the "Oracle of Boston. ": Thanks to his investing prowess, Warren Buffett has made a lot of money in his 88 years — he's currently worth nearly $83 billion. But there's a less famous billionaire investor whose skill has earned him the accolade, "the next Warren Buffett": hedge fund manager Seth Klarman. Investors look to Klarman for his "sober and meticulous analysis," according to The New York Times, so he made headlines on Tuesday after issuing a stern warning that increasing debt and global tensions could potentially bring on the next worldwide financial crisis.