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?
If the token you hold hits the new ATH, it must be sold. Because we should take profit. Otherwise, if the price of token goes down later, you have to regret it. We should always be in the habit of controlling greed and taking a profit.