Bill Gates – $147.5 Million, Washington

The list of the world’s richest men would not be complete without the tech mogul Bill Gates. Gates was a college dropout who became a billionaire after changing the technological landscape of the world. Aside from that, as predicted, he was also able to change his life and secure his dream home. Located in Washington, Gates’ estate is a 66,000-square-foot mansion that has a huge personal library. It’s worth around $147.5 million, not including yet the home insurance which is probably in the millions as well.