I think Bitcoin is more than just an asset. It works very well as a specialized currency in the online marketplace. If I start an online business, I doubt if I can make a payment with another type of asset except in bitcoin. It qualifies bitcoin as currency. I agree at this time we can not make instant transactions with bitcoin as required in everyday life. But we'll get there too. Because bitcoin is growing for that I can not say for sure what bitcoin is. can only say. For me, bitcoin is the currency, because if you can buy something with it, and for me it is the currency. But not many places where I can spend the cost, so I turn it into a fiat.