You can actually see it first at the whitepaper of that cryptocurrency since it is the most important thing in a campaign/project, it serves as the backbone of the project because all the plans and mission is stated there. Also you can check the team of that particular project and check if it obviously legit. Another thing you should consider of identifying scam projects is the moderator or the bounty manager itself if the account is in low trust or called red trust. Another and the last thing you should consider is the reviews of other people who are buying or joining that project since they experienced that themselves. You should consider these things for you to protect your money and to achieve your goal here which is to earn money by trading or different kind/way of earning here. Because in a place like these there are lots of scammers since we are making money here.