Sometimes you need to experience it yourself to take in the lesson and learn from it. Some people ask advice from others but do not take it seriously because they didn't experience it themselves but once they have first hand experience then that's the time they will realize the importance of the advice. Good for you OP you already learn your lesson earlier because others who are "lucky" being able to ride the coin and sold higher are maybe thinking that trading is just easy. We can see others posting that they profit tenfold from a coin so many newbies would just immediately join the battle without bringing any weapon and it end up being killed.

Failure is a better teacher than success do so this advice of you OP would be good for others who are yet to begin crypto trading. I have experience these mistakes myself so I can relate to you but now, I learned my lesson and know the importance of having a trading plan and not being emotional and greedy when trading. Plan your trade and trade your plan.