I think there is value in the idea itself. If I just give it away for free, whoever implements it has no incentive to share the profits with me.
If I share the idea, I make no money from it. If I don't share, I might one day have enough time to implement it myself, or run into people I can trust 100%. If these are the only options, I HAVE TO choose the latter, and not share it for now :-(
But you have to ask yourself, what are you doing currently that is more valuable than the idea, and if that is the case, then how valuable is the idea to you at all?
If what you are doing right now isn't as valuable as the idea, then why not work on it (right now, with someone you trust) instead?
If I share the idea, I make no money from it. If I don't share, I might one day have enough time to implement it myself, or run into people I can trust 100%. If these are the only options, I HAVE TO choose the latter, and not share it for now :-(