There are many coins which have not written a single line of code when they release their ico and yet they become successful, why that happens? Because they had good developers, if you find a coin that has nothing to show but the lead developer has experience with other cryptocurrencies and those coins have become successful and the idea behind the project makes sense then it is a good idea to invest in such a project since not many will like to take such a risk, and at the end your profits will be even better since you invested in a coin with a relatively low market cap.