Many people invest in ICO. And in order to choose ICO it is necessary to analyze a lot of information: idea, whitepeper, team. Read reviews from cryptanalysts and study ratings on various sites on the topic ICO.
In addition to the rating and ideas it is better to look ICO categories.
I conducted statistics on return on investment (ROI) in ETH and $ depending on the type of ICO project
As we see the best projects of ICO companies are Exchange and Blockchain. The most unprofitable companies are Banking and Real Estate.
By the way, the first ICO where I invested was Real Estate. I believed the idea of the project, whitepeper and the experts' opinions. And this investment is in a big loss.
In addition to these categories of ICO, there are others: Artificial intelligence, IOT, VR, Energy, CryptoFund, Hi-Tech, Ticketing etc. But for qualitative statistics these companies were few.
But, please, do your own research before making any investment decisions.