Not sure what you exactly mean.
Invest in projects with a solid roadmap, excellent team and a community and you will be fine.
If you throw money are pump and dump copycat shit coins you will loose in the long term
Then this thing should really be avoided on all cost but the main question here is that on how you would spot those kind of projects? Back in the past you can able to identify a shit project compared to potential ones but now on recent days even shit coins do already have a good whitepaper and any graphics that would really be attractive as an investor which would turn out to be shit later on.This is why its not really guaranteed to talk about evading possible scam projects completely.