It all depends on where you want to invest your money, and there you need to decide what amount is suitable, and then follow the development
I think that the project should be studied as much as possible at the moment when you make investment decisions. After that, of course, you also need to follow the developments in the project, but the main analysis of the project must be done before making a decision on investing.
Before you get to a new project, you always need to study it, communicate with the team and look at how it behaves, communication greatly affects the development of the project and investment