My candid advice, before you invest in a project ask yourself;
1. What are the benefits of this project to the world and the future?
2. In the next 2 to 3 years, will the working product still be relevant?
3. Who is the targetted audience? Do the targetted audience really need this innovation?
These are extremely well put and can hugely help one to decide whether invest in project or not.
For anyone who would argue with that - I have bad news, you think you're investor but actually trying to win in the casine