Many crypto projects have excessive false claims to provide investors with maximum profits, and greedy people are always baited and scammed. Over time scam projects will slowly reveal their true colors, they are just trying to deceive investors.
So learn to analyze crypto projects and don't believe in any promise of high profits.
Well, the truth is that some people had learn from their mistakes but some still accumulating these shitcoins. That is why we could see that still a lot of people get scammed and the number of scam projects is also growing. If we all just know how to assess the project or even just be cautious in investing in projects who promise huge returns (APY), I could say that they will be getting out of their numbers and turning to zero in the future. But I'm not sure how we could change this situation knowing that there are a lot of greedy people that are still looking for instant money and quick-rich.