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?
there is no denying that an investor buys coins and makes them an asset for the long term only to get a price that is much more expensive than the initial price when buying. so if you buy a coin and it's only been a few months since the coin reached a new ATH, it might be better if you sell it you get a 100%-200% profit. and after selling the coin maybe you have to wait a few days or months to buy again at a low price and you hold it until the price reaches ATH again.
but it's all up to you to sell your coins or not. because all decisions and risks are only you who bear it