When market tells you so. ATH is often a best time to sell it. Especially if ath happens on bear market
is there any potential for a coin to pump up to ATH during a bear market?
the odds are very small for an asset that is mostly integrated with the bitcoin market.
actually very simple, we can sell when we get the profit. Don't be too greedy, we've already seen how the market traps a lot of greedy and angry people when it's too late to get pumping momentum.
plan each of your asset investments properly. and control yourself.