You don't want to sell it to people that can easily build it them-self. You want to sell to people that has the specific problem and in need of a solution. The

You don't want to sell it to people that can easily build it them-self. You want to sell to people that has the specific problem and in need of a solution. There is always the possibility that your idea will get stolen. But again, those that can easily build it them-self will have a hard time seeing the business value, and will think your idea is stupid.