Additionally, it is hard to say IEO invesment is safer, because even exchanges don't got hack, or scam exit, investors can get losses too.
Buying at highs, selling at lows, and eventually get losses as ICO's invesments.
On a contrary, those exchange sites are reputable so they somehow filter what projects they'll launch though we can assume that this project can offer more pay just to be launch on those sites. We can in fact use these sites as a guide but don't depend your decision on it either be in hype. We're on the space of uncertainty so choose and think logically.