Yeah if you want you can try to play the sell the top and buy the dip game, and sometimes I do that with coins like Algo because of how the value plays out, Tezos as well. However with like Pirate chain or ethereum I am just holding. You really have to watch the markets and the trends, if a coin hits a new all time high, it will likely correct shortly after about 30% in some cases so, if you want you can play that game but you may miss the most parabolic gains by selling early, I rather just be patient mostly and wait for the really big gains over years.