The mobile app market is a gold rush. A lot of people are going to get their pans out to sift for gold in the sediment and basically come out empty handed, or maybe a couple of bucks richer. Your best bet for making money off software is either selling to businesses (which involves making large, well-supported infrastructure for whatever your product is, for deployment purposes) or utilities that people can use.
Nothing's going to stop people from using a good idea and trying to make money off it, but you can control how you implement that idea. Some implementations are better than others.
