And no, there is no way to know who has the most amount of bitcoin, so this thread is useless, there is no way to check it and see who is the most millionaire in here, lol.
Just imagine, a lot of people would try to hack that poor guy's wallet..
There are some ways to narrow down the list of people who own the largest wallets and there are certainly some wallets that have already been identified, and a few even labelled by their own users. Notably some large sites and exchangers' so-called cold wallets are known.
Keeping your address private is just that. Privacy. Your wallet being visible doesn't actually decrease your security. Otherwise the transparency of the blockchain would be a flaw.
So, don't pity the guys in this list. You can try and hack their wallets all you want.
https://bitinfocharts.com/top-100-richest-bitcoin-addresses.html