Such as ICO project in the past, there are good and bad/scam project and the same with the DeFi project. The lesson here is don't just put an investment to the project just because you saw that is trend, make a research don't just put your money in DeFi.
Scammers have always been parasites in the crypto space, throughout the history of crypto projects have never been free from scammers, starting from ICO, IEO and DEFI. Their presence is very disturbing, thus making investors suffer huge losses. Investing in crypto projects is very risky, but we can avoid it by researching and understanding the direction and goals of the projects we are going to invest in.