Now there are no such countries.Below you can see the rumors about this
In recent months, Bitcoins have been all the rage especially as the crypto-currency has begun to climb in value. The spike has once again shone a light on the digital currency as a potential alternative to fiat currencies, which currently is witnessing all kinds of volatility thanks to Brexit, central banks’ thirst for printing, and massive deficit spending. While many investors see a positive future for the alternative currency, the true test of Bitcoin will be if a nation adopts the currency. The adoption of Bitcoin as a national currency will bring with it a plethora of financial securities but at the cost of eliminating the ability of central banks to print currency endlessly.