Before you do any investing, it is a great sign if the project can show a minimum viable product to showcase that their aim is indeed achievable. Many ICOs promise too much but has really no intention of fulfilling any of it that's why one must be careful.
it is true that you say, if a project can achieve its softcap target it proves that the project can be implemented according to the roadmap. and make sure that the team running the project is also competent