In the market as it is now, many altcoins are rising in price. Like a pumped solana and luckily those who have sold at peak price. So don't try to keep holding it, because it will definitely dump. I will sell altcoins when the price has gone up, but will not hold them for the long term, because to get back pumping, altcoins have to wait for bitcoin to return bullish.
Selling altcoins when the price is already if already in profit is a wise decision whether the current price is on its peak or not, after all there is always a price correction after an altcoin is reaching the new all time high. After that, we need to analyze when is the right time to buy when the correction is happening. However, what truly hard is to know whether the correction will continue to make the price going down to when it's about to be bullish or will the correction create another bullrun. For traders, knowing that is essential to make profit from the price correction.