I will sell my coins when I reach the target I want I didn't research the trading chart as soon as the price was enough I thought I would sell it immediately, at the beginning I often felt regret because I was greedy and was always dissatisfied and in the end the price went down again, so In my opinion, make your profit target and if you have reached it, take your money immediately.
I think many hodlers too have regreted sometimes like you when they are feeling price will continue to increase but got disappointed never to know that was the top so far. Making a target like your decided to do look nice and to get off when it is time but that target also can be affected by greed to get more profit

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I know their mentality at that time. They when are in the rising they think that now the price will continue to rise continuously and when they see a little back way of the price they think that it is a little correction and after that the rally will begin on its way again. But when a deep drop happens they regret that previous time.