Bitcoin created to be currency but bitcoin now is also good asset due to the increasing price of it. There is no problem whether bitcoin is considered as currency or asset, Bitcoin is a medium of exchange that better than the current currency that we use for daily life.
Yes.If you want to inverse means, you can choose the bitcoin as an asset and if you want to spend some dollar for daily needs, you can convert it to FIAT and use it as normal Currency. So, Bitcoin is act as both currency and a asset .Like a gold you can use bitcoin as an asset.