I don't believe PoS (proof-of-stake) is secure and it is inherently top-down control not decentralized crypto-currency. See my upthread explanations linked as follows. I have deleted your post, because you quoted the entire OP and only wrote the one sentence above.
When the price increase there is a huge selling pressure on those who have the largest stakes. That can be seen with Bitcoin where there is a 17% dishoarding rate every doubling and also with NXT for instance (
https://bitcointalk.org/index.php?topic=345619.msg5098747#msg5098747).
Basically the more adoption, the more the stakes are decentralized, the less trust is needed. Price increase (i.e time) is a force of decentralization.
And I don't see how the fact that you cannot distribute new coins is relevant to the security issue.