Take a moment to imagine working for yourself on a daily basis, doing what you enjoy. You can take on projects that appeal to you the most and feel proud as you watch them grow and add value to the market.
If this scenario sounds more interesting to you than spending your days working 9 to 5 for someone else, then you likely have an entrepreneurial spirit.
The Internet is full of opportunities, from something as abstract as an idea to a concrete product, you can sell anything. The only thing that is required in the process is your level of understanding on how to get started and maintain your business.