Bill Gates — $147,5 millions, Washington

Bill Gates represents the Cinderella story perfectly. He was the unloved geek who has now turned into a billionaire businessman, creating and controlling nothing less than one of the biggest companies in the world, Microsoft. His overall success meant that he was able to build his own house in Washington for a showing of 147.5 million. The mansion includes 6,600 square meters of land, as well as a gigantic library, which would make any book fanatic die of envy. Since he obviously loves technology, you can imagine his house is stuffed with every gadget imaginable.