The next country should be the USA as some in the congress are beginning to understand that Bitcoin is here to stay, and for good.
During testimony on July 17, U.S. Congressman Patrick McHenry, who represents North Carolinas 10th District, told lawmakers directly that attempts to stop Bitcoin were futile.
The world that Satoshi Nakamoto, author of the Bitcoin whitepaper envisioned, and others are building, is an unstoppable force, he said.
Therefore, from the way things are going in the Senate, and considering the sheer number of Americans interested in Bitcoin, I won't be surprised if we become the next country to fully adopt Bitcoin.