I also believe that you should stop using ETC, at least until the hashrate is more distributed. The risk of 51% attack for this network is really huge, might as well use LTC or other chains.
There's a surge in ETC's price for the past week and that's why there are people who are into it. I've also seen in some mining groups that it's profitable for them to get into ETC instead of any other altcoins that can be mined through their rigs.
But just as this now, there's a dip that happened which ETC is no exception and I do agree if someone who's into trading, there's other more to choose from and better than which have experienced 51% attack in the past.