Starting your own business online gives you one huge advantage over any sort of employment possible. See, when working a normal job - the most you can possibly work is 24 hours a day, 7 days a week. (And that would kill you). You are constantly trading time for dollars and at complete mercy to your employer.
But by starting your own business online, you have a thing called leverage. You can create a business model, whether through employees or residual income... for example where 8 people working 8 hours a day you are now being paid off of 64 hours per day.
Leverage is when you can step out of the reigns, out of the controller of your business and still create income. You can create this through two methods: People working or money working. To get the money to work (which is ideal) first you'll probably have to focus on getting people to work.
Thus the best reason to start your own business online, is because it gives you the best possibility at leverage, which ultimately leads to wealth. I highly recommend looking into starting your own business online for the pure purpose that it offers a dynamic spectrum of opportunity - that you can even begin part-time while working a 40-hour/week job.
There is absolutely no secret that the millionaires today are being produced off of the World Wide Web. They leverage all the resources around them, and starting your own business is the way you will finally find that freedom in your life.