I hear a lot of hasbeenpreneurs complain that they quit because there was too much competition.
The thing is, if you don't have any competition you are probably in the wrong place. There is probably a good reason no one else is doing what you are doing.
Seth Godin recently wrote about this:
Competition is a signal. It means that you're offering something that's not crazy. Competition gives people reassurance. Competition makes it easier to get your point across. Competition helps us understand that people like us do things like this.