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.
If greed can be conquered many altcoin holders would have made it big in crypto. I stick to my profit target and sometimes I even withdraw once I see it's equivalent. This excercise requires lots of dicipline over greed. Altcoins is best invested in during it's early phase and once it's surging high it's wise to take profits then decide if you would still want to reinvest or look for an alternative either a different coin entirely