Forbes crowns American investor Warren Buffett as world 's richest person . After 13 years on top , Microsoft 's Bill Gates drops to number one position . Russia joins Germany as No . 2 country with 87 billionaires . Check out the youngest billionaires » . Facebook founder Mark Zuckerberg may be youngest self - made billionaire in history .
Forbes crowns American investor Warren Buffett as world 's richest person . After 13 years on top , Microsoft 's Bill Gates drops to number one position . Russia joins Germany as No . 2 country with 87 billionaires . Facebook founder Mark Zuckerberg may be youngest self - made billionaire in history .