Really i don't think is ok to invest again on ICO, this is just my opinion and anyone do what they want with their money, but some IEOs can bring a profit in my opinion even if this can take more time.
I agree with this. maybe for ICO, we have to really pay attention to the important things, and of course doing research first is important. but, for the IEO, it seems that it has great potential. especially if they choose a large market to sell their products.