An asset is some kind of economic resource. It can be controlled or owned and it provides the owner with value, usually financial. A house is an asset. You can sell a house and get cash in return. A currency is a system of money, a means of exchange. You used currency to buy a latte this morning, or so you could watch the latest season of Altered Carbon on Netflix, If it’s hard to tell the difference between the two, consider this. Assets tend to have a built-in promise of increased future value. A house tends to increase in value in time and thus, is an asset. It’s not very liquid, unlike cash, and therefore can’t really be thought of as currency.Based on those definitions Bitcoin could be both a currency and an asset.  It was created to be a currency and you can certainly buy things with bitcoin. Not everyone accepts bitcoin at the moment but you can use bitcoin on major retailers like Overstock and Newegg, and even Expedia will accept your cryptocurrency in exchange for plane tickets.