The current hot topic is Luna. It's very sad that a lot of investors bagger due to Luna drama. The more sad thing is some people committed to suicide. Even in my country, it has happened. I will say think kind of situation occurs due to not following two very basic crypto rules. I know everyone knows these rules, but want to share again and remind you what would happen if you don't follow these rules.
1. Don't invest in crypto if you can't afford the loss.
2. Don't put your eggs in one basket.
It's pretty simple rules, I don't think here needs any detailed explanation at all. We should invest only what we can afford the loss. And shouldn't invest in one coin all of your savings. When you invest multiple coins that won't scam you at the same time. So follow the very basic crypto rules and don't commit suicide.
For us who experience losses from the past yes we can say that we already follow this rules because we already know the end point of taking so much risk for investing on single particular project.
But for newbie I believe not because most of them easily got hype or get FOMO for certain project especially when they see something huge money offer to them if they participate on what their friends or people told them.