Jeff Bezos vs. Mark Zuckerberg

Growing up, Bezos worked summers on his grandfather's ranch repairing Caterpillar tractors. Bezos met Google founders Larry Page and Sergey Brin in 1998 and managed to become one of the company's first angel investors, putting in an estimated $250,000.

Zuckerberg and his wife, Priscilla Chan, are spending $3 billion in an attempt to end, cure or manage all disease by the year 2100. In January 2019, Mark Zuckerberg purchased $59 million worth of waterfront property on Lake Tahoe in California.