Jeff Bezos' networth is 190 billion. Satoshi Nakamoto could be owning around 1 million Bitcoins. If 1 Bitcoin would cost more than $190,000 than his networth would be more than that of Jeff Bezos', assuming it won't change, for the sake of argument. There are other individuals who hold a lot of coins, but still much less than a million coins, so Bitcoin would need to cost millions of dolllars for them to become the richest person in the world.
A long way to go, bitcoin may reach that price within 3-5 years I guess, considering stable price growth over time, it is possible.
Nevertheless, bitcoin belongs to Satoshi Nakamoto is considered as 'lost coins'. We don't know what happen to him all this time, whether he is still alive or he has thrown the coin away for good, delete the private keys. in this case, no one besides Satoshi Nakamoto could become the richest man in the world by holding so many bitcoins.