Buying and selling are a part of the trading process and selling for a profit is not wrong. So you should sell and then buy back at lower price in order to continue the cycle with the market.
Buying and selling is as hard as finding a hidden gem. it also requires a lot of knowledge and cannot be done without any knowledge. I prefer to look for potential new projects than choose to trade, trading is not necessarily as profitable as investing in hidden gems. Finding potential projects like sol or avax is hard, but it's more fun and less stressful than trading.