Well it is called cryptocurrency. Indeed a currency. Some use it as payment to their purchases that accept bitcoins but I dont think there will be one country that will accept bitcoin as their national currency, first because of the volatility and next is its feature.
Yes you find the right thing .Bitcoin is the best and a popular cryptocurrency in the world . Its still most of the countries are not accepting it so that its so difficult to set up as a currency to any country as it is high volatile .The world using it as a currency for transaction as a real money . We can see something new in the future and we hope that it will be replace as a using of flat money.