Bill Gates may be one of the 10 richest people on earth, but he doesn't plan to stay that way forever. The billionaire philanthropist and co-founder of Microsoft has pledged to give away most of his wealth to charity, which he says will bump him off the world's richest people list. Gates' net worth is $160 billion, according to Bloomberg's Billionaires Index. He is one of only a handful of moguls to reach centibillionaire status. He's also made some lavish purchases over the years: Gates owns a mansion in Medina, Washington; a private airplane; and a luxury car collection.