Many will reply you with the ICO they have in their signature and that does not guarantee the ICO will indeed be good thereafter. One of the ways to make a good choice is by going through the white paper critically and be ready to take risk based on what you have seen in the white paper. This does not still certify you have chosen rightly. Just know that the main thing is to be convinced from what you gather in the white paper and be decide whether to take the rish by investing in it or not. Use your discretion!