Since the gold standard system was abolished, every Government is like a BTC trader, the only difference is that those tenders are controlled and traceable, whereas what makes BTC more attractive is its free market and non traceability.
BTC has remained a tender for payments all over the world, at least from the past seven years. Many organizations are paying or accepting payments in BTC, which creates a real demand for it. The organizations/individuals doing transactions in BTC do not want their Governments to peep into their financial position and levy taxes. Thats the attractions which is missing in the Fiat.
Likewise, you may compare the case with an rganization/individual asking you for a barter trade rather than a monetary transaction. Lets say you sell me something and I offer to pay in Gold or Silver or maybe Oil. It still is a trade and a transaction, without involving any Government's legal tender. It is also untraceable and if you are successful enough, it is also not taxable while resting in your "closet".
Likewise, BTC is a digital commodity, comparable to Gold and Silver. However, as I said earlier that the point of consideration is that there is no real value addition in the chain, but the miners are constantly adding up to the price of BTC due to their electricity bills.
This point needs a careful consideration, since in the commodity markets, the production and consumption pattern is not ignored and it also plays a role in determining their market value. Whereas, in BTC, this is missing.