Jeff Bezos and Elon Musk top Forbes' annual billionaires list
Most fortunes grew in 2020
Amazon CEO Jeff Bezos is the world's wealthiest person for the third year in a row
Bezos stayed on top despite giving away $36 billion in stock to his ex
Gabe Newell's $5.5 billion net worth makes him one of the 100 richest people in the US
His wealth has more than doubled since last year