We do need element of luck while doing researches, but it is possible to analyse well to be honest, if you can dyor , check through whitepapers thoroughly for key words relating to bounty rewards etc. you will avoid alot of story projects.
It is much better to do research than not to attempt it and depend on luck unlike what @Jonyshake71 suggest The only clause to that is if one does not know what to check to be sure that's project bounty is genuine, then going for random and just engaging in everything one sees might be another option. Notwithsatnding, i still feel that research is of utmost importance.