The richest 1% of the world owns over 50% of the world's wealth. There's no reason to believe the distribution would be any different for cryptocurrencies, particularly since owning over 50% of a PoS cryptocurrency would mean non-stop, no-cost 51% attacks. Allowing the control of a network to become so centralized defeats the entire purpose of blockchain tech and would likely cause it to implode.
Here's an article backing my 1% claim, it's a few years old but if you google the topic you'll find tons of corroboration. https://www.cnbc.com/2017/11/14/richest-1-percent-now-own-half-the-worlds-wealth.html
The richest 1% of the world population would be about 80 MILLION people.
What's your point? There's a 7.53B people in the world, some % do have an access to the internet, how many % of them do you think owns any eth? He was talking about centralization, not on how big the numbers sound. But they will sound lot smaller when you think about it like that.