I really sympathised with you for being cheated but I don't think cheating can be totally eradicated in human history all you have to do anytime you want to trade or invest is to be careful.
The best decentralized exchange as at noe is idex although idex was hacked some time ago but it was rectify without affecting the training but only affect the traders which does not excluded me still the are the best.
The of has go down beyond the reasonable price and it will still go down before picking up again so to all investors this is a good time to invest in ETH
Great ICO This project equipped with great ideology. I think 20% interest is okay for the start and I believe many investors will utilize the advantage.