1) Sharing the information isn't that hard; the internet is amazing that way. Sure most people won't get it, but if it has value, enough people will. But if it's as good as you say, you'll most certainly lose control of it. If the idea helps a lot of people, this is the way you should go.

2) You can stay quiet and when it's done, talk to a lawyer about IP rights. While this ensures you maintain control, it also will slow down the development.

Either way can hurt you or help you (and the idea). In the end, the decision is yours.