From Riches to Rags – Terrible Stories Where the Rich Lost Everything They Owned

His heirs left him with nothing

Indian royalty Osman Ali Khan, the last Nizam of Hyderabad, was once the richest man in the world. He was so rich that his paperweight is a $200 million 185-carat diamond. But his life decisions eventually caught up with him and drained out his wealth.

Source: WorldLifestyle

He had been known to sleep around and had 86 mistresses in his harem. By the 1990s, 400 legal heirs were claiming a portion of his wealth. In the end, he ended up owning less than a fraction of his original wealth.