I assume they sold some of it by now. But I see your point, does pos make the rich richer? Rich people can stake almost all their ether. since you can't move y

I assume they sold some of it by now. But I see your point, does pos make the rich richer? Rich people can stake almost all their ether. since you can't move your ether for a long period of time after you stake it, staking is impractical for many. The first version of Casper will also include a minimum of ether to stake, though there are pools and they want too lower it over time.