Bitcoin can use to purchase online. So most common use of bitcoin is transactions online lke shoppin online. In my country we cant apply it yet but i think in other country we use this. Anyway its online so most of the product online is international. In other country they can use this to pay bills, pay in a hotel and order fast fod chain.
you're right, here in our country bitcoin really in demand, as a matter of fact, in our company were i work in, almost all my office mate are working in bitcoin and we are free from everything cause our government didn't ban bitcoin. Unlike other country they totally banned bitcoin because they don't want to regulate it cause bitcoin doesn't control by anybody else. it's a virtual currency were in anybody are free to do everything. bitcoin is usually use to buy different altcoins to trade in.