For what it’s worth.
If you truly have an original idea that is patentable and as a result profitable, well over 90% of the people you talk to will not get it.
There is point in which you will need to disclose your concept and trust folks not to steal it. They don’t know what you know.
Non-disclosures etc, are worthless.
An NDA is a binding contract, and therefore Not worthless. A patent is not a contract and is closer to worthless, especially (as mentioned) if it is owned by a little guy.