If you are really worried and want to know how to protect your ideas from being stolen, you probably don’t know how common ideas are.
And how little value they have before anyone takes action to turn your idea into reality.
Seriously, most people are too busy to steal your idea.
Even if they hear it and they like it, they probably won’t have the same level of energy you do around the whole thing. And they’ll never actually do anything about it.
Thomas Edison is quoted as saying “I have not failed, I only found 10,000 ways that did not work”. This when talking about the development of a commercially producible light bulb.
The light bulb wasn’t an original idea; there were quite a few people working on it.