Bitcoin is just a virtual currency, but it is used as real money to buy many things. There are many people who accept Bitcoin payments for items, including online stores and regular stores. Popular online stores accept Bitcoins including Newegg, Overstock, Microsoft, Dell and more.
In the United States, there are Reeds Jewelers, One Shot Hotels, Holiday Inn, and even pizza locations, restaurants and more. You can even use Bitcoin to buy addictive drugs, gambling, bullion, or even donate to charity. This is the reason why I like BTC.
I know the list of what bitcoin can or will be able to purchase is still increasing. By the time Amazon and eBay accepts bitcoin fully, there won't be a barrier as to what bitcoin can get compared with the fiats. We are migrating into the adaptation stage very soon.