Musk was born in an affluent household, which is not the reason behind his multi-billion empire. PayPal was sold to eBay in 2002, out of which Elon received his stake worth $175.8 million. His other Billion dollar companies, Tesla and SpaceX, are doing well today, and Musk has a good share in either of them. His investments in the right sectors made him what he is today. His net worth rose to $253 Billion, making him the richest person on earth.