​What gives you confidence in sharing your Ideas?

This is more of a personal question, not a theoretical one.
I know that most think that ‘execution of an idea is way more important than merely having an idea’.
For some it might be their network, some it could be their niche skill or insight; but everyone at the end at least theoretically speaks of execution.

But here, I want to know what you feel gives YOU the confidence that sharing your idea is not problematic even if someone else may attempt to create the same product/service?