Brian Chesky
When you need money for your rent, you can come up with the craziest ideas. That’s pretty much what happened to a young man called Brian Chesky, who once rented his apartment with three air mattresses when every hotel in town was booked to make extra cash.

Little did he know then, though, that this experience would inspire him to create Airbnb and become a billionaire before he turned 40. Now, Chesky doesn’t have to worry about his rent anymore, as he’s worth over $14.7 billion.