Net Worth: $30 billion EQUAL
Source: Mining, oil
Brazil’s richest man is riding high on oil fever. His oil and gas driller, OGX Petroleo e Gas, produced its first oil in a test well offshore in late January; his 61% stake in the company is worth $19.8 billion-two-thirds of his net worth. The bombastic entrepreneur is also betting on his former passion, gold: In February 2011 he spent $1.5 billion to take private Canadian-listed Ventana Gold, which owns what he says is an incredibly promising mine in Colombia.
(Chris Goodney/Bloomberg via Getty Images) More From Forbes: The World’s Billionaire Women The World’s Billionaire Newcomers The World’s Youngest Billionaires The World’s Billionaire Dropoffs The opinions expressed are solely those of the author and do not necessarily reflect the views of Comcast.