I learned from experience that when we trade or invest we also need to monitor coin movements so as not to miss the opportunity to sell. On the one hand, make decisions in every step you take, for example, don't be greedy when you make a profit. I always apply this and can at least minimize the risk of loss.
Investing profit is basically only considering selling in the context of bull run may not always be correct. You may have had dips a month ago which is currently crossing bullish but it may be that the uptrend may continue for longer and if you decide to sell you may have made some profit but may regret it more in the future. Most of the time investors may not get the dips they want which is like short time interval selling decision to withdraw from high profit. Here mainly greed works among investors which withdraw for small profit.