Yes, this is the root cause of the current market decline. The market has recovered its ideal and people no longer blindly buy shit coin. They are beginning to understand whether this project is a good project.
You are right, the existence of a scam project causes investors to hesitate to invest in coins. But at least we are more careful in choosing a coin in order to avoid a scam. Try to see a coin site or get an ICO rating, usually a coin project will be successful if it has a good rating.