Everything I have seen is saying most people will be switching to RVN or ETC potentially. When PoS is fully implemented there is going to be a period of time where there are massive shifts in hashrates on multiple coins as people move away from ETH and try to find what is most profitable.  While this may create a few weeks or months of uncertainty on which coin will be better to mine it could also provide a bump in price to certain coins.  If you happen to be stockpiling the right one from now till whenever PoS is fully implemented you could stand to make a nice gain.