Your chances of success will be much higher if you do something that other people are already doing successfully because they've proven that people are willing to pay for that service or product. If your idea doesn't solve a problem, then you essentially don't have a market. It's much easier to sell to an existing market than to create a new market because you don't have to spend as much time or money on educating people. Educating people with no guarantee of a sale is an expensive activity.