Bill Gates
He was the richest man in the world. In October 2017, his net worth was surpassed by Amazon founder and CEO Jeff Bezos. Bezos had an estimated net worth of US$90.6 billion compared to Gates's net worth of US$89.9 billion at the time. As of January 2021, Gates had an estimated net worth of US$163 billion, making him the third-richest person in the world. And now, he is the third-richest person in the world behind Jeff Bezos and Elon Musk in net worth as of January 2021.