21 Richest Billionaires In The World

20. Warren Buffet

Warren Buffett World's Richest
John Shearer/AP

Rating: $74.4 Billion

The "Wizard of Omaha" was the most successful investor of the 20th century and was voted one of the world's most influential people by Time magazine in 2012.

Astonishingly he has pledged to give 99% of his fortune to charity.

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