These aren't values, but definitions and I'll have to disagree. It's an internet currency. Sure, you may use it as an investment or a store of value or even just to speculate, but the only reason it exists is to be used as a currency. If none saw it like that, it wouldn't have a purpose to be an asset.
People invest in things for their future usage. In this case, they invest so that one will use it as a currency in the future.
I tend to agree. Bitcoin's only value proposition that really matters is that it is decentralized digital money that no one can stop or censor. Other use cases of bitcoin, and also different philosophical, economic, political standpoints about what bitcoin is or isn't are merely derivatives from the main use case, which is when bitcoin is playing a role of a medium of exchange to frictionlessly acquire goods and services. Moreover, being a medium of exchange is a primary function of money in general and of bitcoin in particular. The existence or absence of other functions such as store of value or unit of measurement fully depends on how well a certain type of money performs its main function. If bitcoin cannot be exchanged in the first place, if its first function is not present (censorship, no confidence in bitcoin, no liquidity, no market), no one will be willing to store their wealth in it, no one will be willing to trade or invest in it.