14. Mark Zuckerberg
Being one of the wealthiest men across the world, the Facebook founder is quite thrifty with his hard-earned cash. It was reportedly said that Mark Zuckerberg left without leaving a tip for the waiter, when he was on a romantic dinner with his wife Priscilla during his honeymoon. And, you would be surprised to know that the bill was only $40. The hoodies were surely the first hint towards his economical habits.