witch country do you thing will be the first who will accept bitcoin official money as payment?
As you can see in this
scheme (sheet 2), the highest density of venues accepting Bitcoin are in Tampa and Kansas City, both USA.
In general, USA also has the highest number of users and venues on all territory.
Despite intuition, poor countries are not the first users that will gain access.
Poor countries have problems in buying a smartphone or a pc.
Other factors are more important, like tech savvy percent of population in example (that's why US is on top, together with Europe and other country with good income and instruction).
But I think that there will not be a real "first nation" adopting Bitcoin.
It will be a slow and steady adoption together in USA and Europe first probably, and following other countries like Argentina, Brasil, Mexico, countries that are not too poor but not rich either, and that have problems with their currency. The ones that are at high inflation but where population CAN actually buy a pc or a smartphone without collapsing.
A good case to examine is Greece: it's in Europe, it's not too poor, but despite this Bitcoin adoption in there is very very low. I think this is due exactly to poor pc penetration in the country: people are afraid of this "computer money" they can't understand, so they need more bashing before go and learn what Bitcoin really is.