if you bought a token for a long tarm holding and if you have a large target, then it is better to hold on to your target. But if you buy a token for short trading then You must sell your coins at a profit.
What you describe is a strategy of selling coins based on the period of holding the coin,
but the OP asked about how he sells when he has made a profit, I believe this is because he is worried that when he sells his coins the price goes up very high,
in this condition, usually I will sell some of the coins I have and move to other coins whose price has not gone up, so when the coins we hold go up very high we still hold some