Many times I came across the fact that some people hold coins that should have been sold. At one time they were quite successful, but then they reached their price peak and then their price began to decline. It is very important to be able to take profit on time.
because not all tokens are worth to hodl. most of them needed to be sold while they still have value in the market. very few can sustain the market. most tokens die. thats the reality!
i have had so many experiences with tokens that i regret not selling when they hit the exchanges. very few tokens have real use case so they eventually die because traders just move on to the new guy in the block..
only a few altcoins that still have developments that will still be very valuable to survive as some cases of altcoins created from ICO, only a few are still able to survive, so it is better able to hold altcoin that really has potential so it won't make you disappointed.