Rather than a niche "without competition," I would look for a niche with low competition within a very specific sub-niche. Today, I believe it works best to specialize highly (for example, not in economics or money, but in something very specific, like gold, gold trading, mining, etc.). It also helps to choose something where you can contribute real-world experience, things that many people don't know. With a little research, we can obtain information on almost anything, and if we have personal experience, even better. The key isn't avoiding competition, but finding an angle where you can excel.