I sold all my ETC during this pump. despite the fact that they are making some kind of updates on their network, I stopped believing in this coin even after the first hard fork when Callisto token was giving away to the ETC holders. At that time, I realized that this project is a scam like many others and it is a bad idea to hold it in the long run. I bought cheap - sell at the first pump and you should do the same
some people do it that way because it won't go up all the time, when it is pumped the coin will definitely go down.
so selling when market conditions rise is the right thing, unless you are a long-term holder.