If you are very worried before investing in a project, what will you do when you invest in a project? Probably you will drink a sedative.
If you have such a mindset, then it is better for you not to do those things because of which you are very worried.
I did it only once. In general, yes, I find it difficult to restrain myself when my coins begin to fall in value. I hope my nerves will become stronger with time.
I also find it hard to restrain myself when I see how the prices of my coins behave. But I have patience because I am sure that there will be a rise and then prices will rise.