I have several ideas that could make millions. Honestly, but I am only one person and I don't have a team of developers. Wish I did, but I don't. I also don't have the money to quit my job either. So I keep my ideas extremely close to center so I can work on them one at a time.
Heck, I even have an idea that would change the way politics in general is viewed by the public. Its revolutionary and could have a huge influence on changing the world, but I currently can't develop for it because I don't have the time. Its an amazing idea and I wish it was out there, but I would rather wait till I personally can change the world. I don't want someone else doing it, so I keep my idea private until Im ready to start working on it.