even a lot of people holding bitcoin, some of them still using bitcoin as way of online payment. on the meaning its both to currency and asset. on its purpose that bitcoin is a great item that can be used for invest or exchange into fiat, that make the good point of bitcoin. nothing dominant from currency or asset, because bitcoin can be used as both.
Bitcoin focuses itself as currency, investment assets are the options that come after that, bitcoin is never thought of for that, but because the trend is always moving fast and continues positively, bitcoin is able to play a double role, I still think that bitcoin is only for the means of payment in the online world.