The price of coins goes down so you don't sell coins first. You must continue to observe the market situation and when the market pumps again you can sell coins. Hold better coins that have great potential on the market. And sell coins that might have bad growth.
It seems to me that it is necessary to conduct research not only on the cryptocurrency market, but also on the real public interest in this project. The fact is that this project may have good prospects for the future, which means that the price for token may increase anyway, despite its position in the current state of the cryptocurrency market.