Usually, it is already too late before you realized that the project is a scam.
Just look at what happened to Terra Luna and FTX, they have been known to the community as successful ones.
Before they pulled the plug of being a crappy project, wherein a lot of investors lost huge amount of money.
If you are not very sure with the alt you are holding, then sell it while you are in profits.
Because if you wait too long, you may lose a lot because most alts decline its value thru time particularly those without valid reason of existence.
This is the Crypto Market. And I think only one coin in which we can believe that is only Bitcoin because it is totally decentralized. Otherwise if you see others so they have the owners and they can manipulate their coins at anytime..
Like you have mentioned the two big Projects which crashed and scam people and grab much money from them. Luna and FTX both were the good projects but how they crashed no one expecting that.
So we can't say anything about any project because this is the crypto market.