The list of countries:
Bermuda, Greenland, American Samoa, Saint Kitts and Nevis, Northern Mariana Islands, Marshall Islands, Faroe Islands, Sint Maarten, Monaco, Liechtenstein, Turks and Caicos Islands, Gibraltar, San Marino, British Virgin Islands, Caribbean Netherlands, Palau, Cook Islands, Anguilla, Wallis and Futuna, Nauru, Tuvalu, Saint Pierre and Miquelon, Montserrat, Saint Helena Ascension and Tristan da Cunha, Falkland Islands, Niue, Tokelau, Vatican City
Most of them are microstates, of course. But the number is still impressive, considering the fact that there are only about 230 countries in the world.
Let's assume that all active Bitcoin users are on this sub, and thus there are no more than 790 tsd of Bitcoiners (an underestimate by 1-2 orders of magnitude).
As there are more active Bitcoin users than the combined population of the aforementioned countries, it means one interesting thing:
Bitcoin is already capable of replacing the national currencies of at least 12% of all countries in the world. Today. Now.