I think its possible if we join the project very carefully, study the project deeply.
In this case we will near to decide about the project that this project have some potential or will be a scam project.
with a lot of experience, it can prevent us from choosing the wrong project because if we have experienced many successes or failures, it makes us more aware of which projects are good and bad because our instincts have been well honed.
without instinct we are difficult to know about scamp projects because there is no definite theory.