Eth will stabilize and go up in price after POS, simply because there will be smaller amount of coins produced daily, burn process will still cause deflation, staked eth will remove some coins from daily usage etc....
POS will displace small people from the system, game has become to big for small guys if you don't count in staking pools.
Price correction will come eventually, how long will it take? probably few years.
You should know that most of the PoS coins have failed miserably before and what does Ethereum have beside these others that it will continue to be successful after moving to PoS,nothing.Therefore if Ethereum moves to PoS I give it a few months only before it is completely forgotten from the map of crypto,the fact that Ethereum is so successful beside the problems it solves it is a PoW coin which a lot and I mean a lot of people are mining daily making it as famous as it is.One move away from such system is destined to go bankrupt and fail.