Lots of traders regret selling their coins, including me. Maybe my habit of trading with the short term .. it's true that you say that trading with the long term is more profitable than the short term. This is seen after being sold as a coin to go up.
Or just holding is profitable in the long run than you to trade with what you've got. You can make mistakes as you trade while when you hold, you're not going to see that mistake unless you sell early. Usually, that's really happening after when we sell, the price shoots and that's why if you're already decided to sell, don't be regretful that you've sold already because that's part of your plan and decision and just be happy with the gains that you make as you sell whether you're a holder or a trader.