So you have an idea you'd like to test? You've talked about it to your friends and you've had good feedback?
|Make sure you know your tricks well and go for it!|
Then go for it! That's the best way to test if it's likely to work. However what if someone copies you?
Indeed ideas can easily be stolen and replicated... Unless you keep your unfair advantage, that thing you have and others don't, to yourself. That way you'll keep an edge over competition, whoever they may be.
So communicate a lot and early in order to capitalise on your idea and create that necessary momentum to launch your product. Just make sure you have a competitive advantage and you keep it safe.