Bitcoin is not an asset, Bitcoin is money and the definition of money is a currency (ie. a medium of exchange) that can be used as store of value.
But this is a contradictory statement. Money is an asset and if Bitcoin is Money and can also be used to store value, it fits right into the description of an asset.
In the very beginning of economy classes, assets are explained to be tangible or intangible. Bitcoin is an intangible asset. It even fits the definition given by IFRS. Genuine question out of curiosity, can you explain why you believe it is ignorant to call Bitcoin an asset?