The emotion is also playing an important thing in holding your portfolios dude. Imagine when he was impatient and he might have sold all of his coin too early. That's why some people were saying when you can hodl your coin and could be a winner but this doesn't mean you will be automatically be a winner.
When your portfolis already gave you a lot of profit and then it's up to you whether you wanna release your porto to the market or not.