make sure to check a couple of things. First if the idea is realistic, many scam coins usually offer unusual promises or things that are probably not possible, some projects will promise something like 100% return in one month, every month, or something crazy like that. A good thumb rule is: if it is too good to be true, it's probably not true. That's usually the case in anything you try to invest  your money in. Scammer will try to get your attention by offering something that looks unrealistic but is actually possible. What you need to focus on is that you find genuine good projects that have realistic goals and targets and to invest in them in order to profit later on. You might not find every project you pick to be a success but eventually you'll be rewarded if you find a good one that works out for you.