I don't know what you mean about "getting an IP" -- are you talking about registering a copyright or trademark? In terms of protecting your own intellectual property, the best way to protect it is to show it off. That stakes claim to it as your own.
The only reason I can think of to NOT show images of your game is because you are using someone else's IP (that of a publisher for whom you are making the game, for instance) and they haven't yet given permission to show the images.
Don't worry about someone stealing your ideas. You are far along in your process, and if someone wants to steal your ideas, they have a LOT of catching up to do.