ECommerce is a great way to make money online. You don't need to have daily operations, just upload products and wait for the buyers. Many many people prefer staying at home to shop on the Internet, rather than driving a car for an hour and go to the retail shops (not guarantee they have what you want). People living in countries like Canada, Australia must rely on online stores because it's too inconvenient for them to drive for hours to find a shop that can offer what they want. So it can answer someone who may question about the market of eCommerce, just bigger than you imagine.
