The biggest problem of todays society is greed, even when people are doing good profit from a coin (50-70%) they are not selling them. They keep holding all their altcoins and sooner or later the price drops and makes -x10.
this happened to me in the past when I bought ETH, at that time the price had increased but I didn't sell it immediately because I was sure it would go up again but what happened ETH went down and I regret that I didn't sell it when it went up and now I if I do trading if it's a profit I will sell it immediately for fear of repeating again like before