It depends on the details and information of their whitepaper. So they need to developed their blockchain project very well to become successful which will make investors to have an interest on it then make invest on it.
This
Not only on whitepaper but also on its developers because people do mainly seek the transparency on which really do indicates that it is a serious project not compared on shady and unknown developers because we can really somehow assured that this coin wont die easily like on most shitcoins in the market. Investing on Ico would really be profitable but depending on where did you put your money.