I will often find out why the coin is dump. Evaluate the potential and strength of the project, to decide whether to keep it or sell it. And I often trade to cover the lost money. Get experience from losing money.
yes maybe people throw away their coins because they do not believe in being able to go up and be careless or panic so there is a dump. but most people regret doing that. trading right now can also get profit but it's small if you process it properly and correctly.