Investing in ICO is one of the riskiest things to do in the cryptoworld. That why deep research is needed when it comes to ICOs. ICOs might have a good image but to find a successful ICO is very difficult to see. Good example of ICOs can be found at ICO listing sites like ICO Bench, ICO Marks, ICOtoInvest, ICO Holders.
But even ICOs are listen on thouse platforms it doesnt mean that you can expect for a positve result. Of course depends how much you invest, but if its a larger amount I would probably would dig deeper into startups track record, history, existing company or not, making money or not yeat. There are plenty of things to check. My latest investment was into welltrado.io and Im very confident with that project.