Bitcoin - Is it money or is it a commodity - or both?

The rise (and fall) or Bitcoin has gained a lot of attention.  Will it succeed as a new digital currency is one one big open question.  This article from the New Yorker explains the origins of Bitcoin and how it will work as a currency.  However, there are problems with it being able to work as a currency if there is no central bank and a limited supply - it is a commodity more like gold - argues this article from the Atlantic.