You can find tons of guides on how to identify an ICO worth investing. But in truth, it is very hard or near to impossible to get a 100% confidence in an ICO. If you are tech-savvy, then you can dive deep into their code or try to learn more about them, but in the end, ICOs are all about risk and reward system. The more the risk, the better the rewards. I hope that you can hit the jackpot soon! Best of luck!