You can learn from experience, because that's where you get something valuable. Following the trend is great, but it should be noted that you have to learn about something you want to invest in. Strong technicals and fundamentals will make a project that you invest in will end successfully.
If we all have learned from our bad experience before, it for sure no one will become a victim to this trick. And why a lot of projects sprung around from time to time because they always see that there are still a lot of innocent people that possibly be there prey.
From ICO, IEO, and all have been giving us a bad experience. And for now, we have Defi projects and it is quite making the hype again. I hope people much be careful this time and so they will no longer be a victim again.