Many are happy to see their portfolio grow up in value, but they forget that if they haven't realized it in the form of profit, then it's still not profitable. Altcoin holders were made as if they were playing roller coaster, up high, but at one time it descended very quickly.
that's why we need a target, when the target has been reached it is better to take profit. don't be too greedy to take huge profits. the market is like a roller coaster and we don't know what the market situation will be in the future. always use a target for each coin in your portfolio as that is very important.