The correct term for Bitcoin currency I have been reading about Bitcoin and the history of it. But I was not able to find a term that actually describes Bitcoin. 
I am looking for a term that is not only for Bitcoin but any digital currency like Bitcoin. 
The closest term I could find was Fiat money, but it is not correct, anyone here knows what the correct term is? Or does the term simply not exist yet?
The general term in widespread use today is cryptocurrency. This refers to a currency designed upon cryptographic principles (as Bitcoin is).

The term "fiat money" refers to the usual money issued by governments. The government declares "this is money" (even though the paper on which it is printed does not have value itself), and people use it as such. Wiktionary defines fiat as:


  
  An authoritative command or order to do something; an effectual decree.