Some people refuse to take profits when their coins and tokens are surging so high.
Because greed let people keep on waiting for higher and higher value for there coins and end up selling at dip.
Since price can’t go up all the time.
In my opinion, greed is the worst trait of all. Loosing money in crypto because of that is nothing compared to what was done to our world because of selfish desire of a small group of people. If there would be a way to cure this trait, world would be totally different.