Elon Musk becomes world's richest person as wealth tops $185B

Bezos dropped because ex wife got 4%. https://www.bbc.com/news/technology-55578403

He takes the top spot from Amazon founder Jeff Bezos, who had held it since 2017.

Mr Musk's electric car company Tesla has surged in value this year, and hit a market value of $700bn (£516bn) for the first time on Wednesday.

That makes the car company worth more than Toyota, Volkswagen, Hyundai, GM and Ford combined.

An older tweet pinned to the top of his feed offered further insight into his thoughts on personal wealth.

"About half my money is intended to help problems on Earth, and half to help establish a self-sustaining city on Mars to ensure continuation of life (of all species) in case Earth gets hit by a meteor like the dinosaurs or WW3 happens and we destroy ourselves," it reads.