Bitcoin is really a true currency/money. Why? because once you have it you can convert into a real money according to country you belong. And the banks also accepting bitcoin whether you are in different places of the world. In that case it shows how bitcoin is very popular in online business.
You can simply say that bitcoin is a like money that has a high value on online market and trading sites. Furthermore, we all know that we can convert our bitcoin into real money and we can also used bitcoin in many kinds of transactions like paying bills, shoppin on online market and many more. Lastly, I think bitcoin is a new kind of money.