I agree 100% and it's something I've struggled with. I had an ok amount of FTM when it almost hit $2 a few weeks back, and it skyrocketed to be the largest coin, by value, in my portfolio. I didn't take profits there... I thought about it but wondered what do I give up if it keeps going. It was an x8 since my first buy and I'd added little amounts on the way up. I ended up taking small profite on the way back down around $1.60 and really made me feel dumb.Taking profits is actually one of the hardest things, as stupid as it sounds. When your coins are pumping you start to get greedy and emotion takes over. The most successful traders have a plan and they stick to it. Too many people think their coin is going to the moon but then more experienced people take profits and it dumps, meanwhile the bag holders are convinced it's a 'healthy correction' and the price never recovers. I've fallen into this trap a number of times myself and it took some time to get over. Missed out on some big gains early on. Still made profit but it could've been a hell of a lot bigger.
Lesson learnt though.
Same with Coti over the weekend, though I did take 1/3 profit at the top on this one, but then wondered all the way back if I had've taken more. Then again, Coti may not be a bad coin to be holding in the next few months.