I don't think you need to hold them for years, moreover you say (not really going to watch them) I think it's very risky. because not necessarily also when you go on vacation then return to the market the price of your coins will increase many times. at least you have to keep it for a certain period or until you see it has more selling value. in investing, you need to monitor them, because the price of coins on the market is very volatile and you will lose money if you don't monitor your own portfolio. reconsider