According to recent recearch, 56% of 2017 ICOs fail. And you know what? That's OK. 90% of startups fail but the rest grow so high that they compensate venture investors 90% loss and provide very high profits.
So the basic rules with ICOs are very simple:
1. Do the research before you invest
2. Diversify, diversify, diversify
3. Ignore news and HODL
apart from last point i totally agree. you have to be well informed about the project. If you didnt see it coming, for sure you gonna lose alot. I hope this percentage improves in 2018 but still its amazing. Lets hope for the best