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 indeed you have an assumption to hold the coin for many years then rest assured that the coin will give you such a large profit in the future.
even though you have benefited from the coins you hold in a period of only a few months or a year, remain confident and stick to your original goal of long-term investment.
nothing is short in reaching a success because the holder is the real winner.