Just studying about some major crypto rug pulls that have happened over the years and I noticed some things:

Firstly, the coin is always driven by hypes. It'll be hyped and talked about by influencers and popular persons
Secondly, the devs most times develop a mechanism ensuring that users can't sell their token, and they'll use that opportunity to dump on them
Lastly, some are always in the form of yield farming, but they'll end up draining users fund
Always watch out on signs of possible rug pulls!