Why are you selling your altcoins so soon? I think why many people selling their altcoins is just because they want to get their earnings as soon as possible and because altcoins are very fast to dump so that they are selling it immediately so that the altcoins that they have will not dump, also some people are using altcoins to invest and to play some cryptocurrency
games in order for them also to earn more because if they sell their altcoins they can earn also but if they invest they can earn also but it takes time to earn in investments, but when you play some games you can earn as soon as possible and immediately.