First, read the whitepaper, if they don't have the whitepaper, it's meant to be a scam
then check the entire social media accounts, and see the road map
I suggest that you do not invest in a projects that has no refund
very often I saw good projects that had social networks of team members indicated on the site and some members had them almost empty. I don't understand why projects or team members can not fill out their social networks. some people don't even put an avatar