Elon Musk, CEO, Tesla
Elon Musk, 49, has become the world's richest person, adding US$151bn over the last year, which works out at just under a billion dollars every two days, to take him to US$197bn. The bulk of his wealth is from his 21% share of Tesla, which is worth just under US$800bn. SpaceX, in which Musk has a 52% share, added US$13bn in value in the past year, after becoming the first private company to put people into orbit, an achievement previously claimed by just three global superpowers. Musk has not been far from the headlines all year, most recently last month, when he announced a US$1.5bn investment from Tesla into bitcoin. Other projects that have gained attention include the Boring Company which has been digging tunnels to operate high-speed rail service around the Las Vegas Convention Center and Neuralink, which aims to create a working brain to machine interface. Curiously, in 2013, Musk almost sold Tesla to Google for US$11bn.