Bitcoin is both asset and currency . I use bitcoins to pay my bills , go for movies and for buying food etc. so for me bitcoin is a currency. More and more places are accepting bitcoins as a mode of payment. Bitcoin is also an asset because many people like me earn bitcoins , save them and use them for future benefits. The bitcoins value is likely to increase at any time so many people keep it as an asset . It is ultimately the decision of the users that how they use it , whether thy spend it like a currency or keep it as an asset.