A serial entrepreneur, Elon Musk has been in business for three decades. The richest man in the world, his net worth is $485.5 billion — as of Oct. 13 — according to Forbes. Read More: 5 Key Mindset Shifts To Financially Become the Top 1%, According to Humphrey Yang Find Out: 3 Reasons Retired Boomers Shouldn't Give Their Kids a Living Inheritance (And 2 Reasons They Should) Instead of cashing out on his first big payday, Musk has continued to invest in building an array of new companies. Keep reading to ...