Seems many people treat bitcoin like an asset given how much it's gone up over the last year or so. But some academics disagree with that assessment. If it is to be treated as a currency, it will need to stabilize to be of use.
https://www.cnbc.com/2017/10/24/nyus-dean-of-valuation-says-bitcoin-is-a-currency.html
Personally here I myself using bitcoin like currency as well as asset , i am making micro amount of the earnings and putting them for the increase by value for long time ( holding since 2 year and also making passive income by holding bitcoin ) .
At another side I am using bitcoin for selling and buying another coins as well as for the buying goods at purse.io and at another sites also which a re accepting bitcoin as a payment .
So don't think/confuse whether it is currency or asset .