Having a world-famous, previously successful, founder or investor doesn’t give you any guarantees of success. In fact, I’m starting to suspect that once the extra attention you get for being able to name-drop someone famous, it will work against you.
People love supporting the romantic idea of a young entrepreneur hacking away on a genius product from a garage. That’s the dream you want to support.
A millionaire team with seemingly unlimited resources that can throw a luxurious launch party and afford to hire the best designers? You’re going to adopt a platform to make a bunch of rich people even richer? I just don’t think that gets our sympathy vote.
If you are rich and famous, or are about to attract a rockstar informal investor I would keep it quiet until your product becomes popular on its own merits, and maybe then you can subtly hint at the famous people involved.