A lot of people don't know about timing. All they do is hodl without giving a though should they cut loss when it falling to take the fund and utilize it elsewhere. Trade with careful timing until they make back the loss instead of holding it.
There are coins worth holding like BTC and ETH and there are coins good only for trading like XRP or EOS.
I wouldn't hold coins that I don't trust and don't believe they can achieve anything in the long run.
To be honest most coins are crap not even worth trading.