I think that asking for a NDA is a very big red flag to the investor. It shows: Or you are crazy, and megalomaniac, and believe that you have something so awe

I think that asking for a NDA is a very big red flag to the investor. It shows: Or you are crazy, and megalomaniac, and believe that you have something so awesome that the investor will want to steal without having a clue on how to do it. Or you want to make something so stupid that anyone can copy. Or you are just a paranoid sucker that wants to be secretive because you are paranoid and flees your shadows. Or you are a hipster trying to show off with your "stealthy" idea.