an easy way to avoid scam projects is that you just don't need to invest in new projects and only invest in old and popular projects, because most new projects will be easier to scam than old projects, therefore it's better for you to invest in the top 5 cryptocurrency, so you can avoid scam projects, because I believe Bitcoin, Ethereum and Binance are very good projects to make a long-term investments and the chances are very small for the project to be scam (even I think its impossible).