He doesn't just buy newspapers. : Amazon founder and CEO Jeff Bezos launched a new $2 billion philanthropic effort called the "Day One Fund" on Thursday. In a statement the billionaire posted to Twitter, Bezos said the money will be split between efforts aimed at helping homeless families and creating a new non-profit preschools in low-income communities. Bezos is the richest person in the world, with a current net worth of $163.9 billion, according to Forbes. More than 90 percent of the billionaire's wealth is tied up in Amazon stock, since he owns about 80 million shares.