Can I know what difference it makes? Does Bitcoin lose its value if it is known as an asset?
In a simplest explanation, If you see bitcoin as an asset you don't prefer using it as a form of payment but more like a thing which you keep because its value is ever increasing. Bitcoin have become popular all over the world and widely as a form of payment. Bitcoin is really meant to be use as a form of payment to make it circulate in the market. But because its demand is rising its wiser to see it as an asset than a currency.
Bitcoin is not considered as currency because it does not yet serving tge real feature of a currency, it might be a payment but its is not yet accepted by majority and there is no legal recognition from the government.