I choose to hold, because my plan is to invest for long term. I just wait and hoping the price will raise higher and higher. Even the price of my coin is going down, I will not sell it. I am not afraid because I invest my idle money.
That is the one of the reason why we should not invest using money intended for other things. Some even borrow for their investment which is highly not advisable. The reason why they panic is because they are very afraid to lose all and not able to pay those money they borrowed. Holding is still my best strategy to earn more in the future.
For now, you better do not sell your altcoin and better to hold your altcoin because altcoin prices are also not stable then you better wait for everything to be stable and can be profitable again when you sell your altcoin because all its good altcoin price or market still not back well and still up and down