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How Elon Musk, CEO of Tesla and SpaceX, makes and spends his $20 billion fortune

Tanza LoudenbackNov 1, 2017, 17:32 IST

Pascal Le Segretain/Getty

Elon Musk may be the world's richest rocket scientist.

With a fortune hovering around $20 billion, the 46-year-old CEO of Tesla and SpaceX and cofounder of OpenAI has said he won't be happy until we've escaped Earth and colonized Mars. Luckily, he has the mind and the money to make it happen.

A notorious workaholic, Musk doesn't spend cash on lavish vacations or expensive hobbies. Instead, the entrepreneur spends most of his time at the office or in factories, retreating to one of his four Los Angeles mansions at the end of the day.

Scroll through to find out what we know about how Musk, a father of five, amassed his fortune and how he spends it.