Judging from a case like this, I suggest you better buy trusted IEO coins such as Binance exchange and Okex, because the quality of IEO in both exchangers is very good, and I do not recommend you to buy IEO coins at an unreliable exchanger that has a low trading volume
But still, be careful in using the money to buy the IEO because we don't know how their future and how good their project to survive in the market. But I agree that it is better to buy the IEO project from recommended exchanges because the project can get support from the exchanges. Binance, Okex, Bittrex can be an option to choose the IEO, and I think before the project can get listed as the new IEO, the project needs to be verified by the exchanges so it could reduce the chance to be a scam project.