How can we make sure that the investment we use can surely gives us a true profit in an ICO? As an investors we want to make sure that we can surely gain profit on an ICO that we want to invest. Do you look at the ICO ratings from the rating of the ICO website when you plan to invest?
I don't bother looking at them at all. They will only have the same information that exists on the website of the project doing the ICO. They do not confirm that information from reliable third party sources and they do not conduct any serious due dillingence to confirm the information or even the identities of the people behind the ICO. You should not invest without doing your own research.