Prokhorov’s billions

Prokhorov’s billions
How did Prokhorov make his money?

To quote Jay-Z:

(Seriously though, Prokhorov allegedly made his money as the president of Norilsk Nickel, the world’s largest producer of nickel and palladium. He later launched ONEXIM Group, a private investment fund. What’s that? Does he have any skeletons in his closet? Hm.)