If you started a business, what kind would it be?

I guess I would open a coffee bar/shop, something like that because I heard that it is very profitable, a cup of coffee costs about 4-5 bucks, while its net cost is 0,30 bucks. You understand what I'm talking about.) Of course, to open it I need machinery, employees, a cute place and furniture and many more. So right now in the meantime, I am developing my sales skill through an Enterprise Sales Leadership Coaching course, that already helped millions of people succeed in their businesses, and sales careers. After I finish the course I will finally think of a cafe for real.