Seems like the hype of IEO is not over yet. I doubt it will go away really soon but tbh even the most hyped projects on Binance doesn't get a great ROI (only x2 max).
I'd not join any IEO even though it is possible we'll get 10x return. The risk out weight the (potential) profits.
If you want to earn a high profit, the IEO is the best way for you to risk once because most good IEO projects get very high prices and you can see TOP as a coin with a price increase highest with profit x18. I think if you are an investor, you should try it once because the feeling of making a high profit will change your life in a very short time and very few people can do it.