Worrying about whether someone else will copy your idea or not is immaterial. 99.999% of the time they will not be able to copy and execute on your idea. I be

Worrying about whether someone else will copy your idea or not is immaterial. 99.999% of the time they will not be able to copy and execute on your idea. I believe the greater issue at hand is whether your psyche can take the abuse of critique at a really early stage. Oftentimes, I'm really pumped about an idea but haven't formed the entire concept. If I share my baby too early and someone criticizes it, it can be deflating and I often move on the the next idea when in fact the idea I shared may have real merit - I just haven't worked all the kinks out. For some people I suggest waiting to share a killer idea until they have time to work it out. Then when they get good critique, they can use it to refine it instead of deflate it. If you have super thick skin, then I say share away.