I saw at least one post on here from a user I won't call out that went pretty out of their way to hide what they're working on. Yet they were seeking advice from people who would probably be interested in the solution. A missed opportunity :(
You may be looking at the other entrepreneurs here as competition, and that your a minnow swimming with sharks, and you may be right. But that is what being a business risk taker is all about.
Don't hide your product!