Yes, instead of selling those coins for cheap it is very good to wait until the prices start increasing, already people are waiting for the coin to recover their price. After 2017, we have seen many new altcoins launched which there is a huge chance for those to increase their prices.
You just have to find the one that best suits you, since I do not really like to watch the markets every single minute of my day then it is obvious that something like day trading is not for me, but since I can hold my coins even in very adverse circumstances then long term holding is better for someone like me.