Assuming I've made up my mind to hold on to a token for many years but after a year this token hit a new ATH what should I do as a newbie? Sell or not sell?
What you should know is that crypto ebbs and flows will continue to occur. So that the price of the coin will change at any time so that at certain times you get a profit, and at other times you experience a loss. If you believe the project or coin you are holding has future potential, then you can hold it. But if your estimates are wrong, then you must be prepared with all the risks that occur.