Own state creating would not be possible. But BTC users can implement BTC in some small country with the help from that country government. And then if people in that country would start to use BTC, government support - yes, after the time BTC can have great story. In reality this would be very difficult - in each country there are a lot of people - BTC implementation if funding is not state supported - cost a lot.
If I recall correctly, Ecuador was planning on creating a cryptocurrency that could be used as legal tender, earlier this year. They were supposed to start using it by the end of the year, early next year - anyone know how that is going? Of course it would be to our advantage if they adopted Bitcoin instead, but it seems like a nice step.
They were/are planning on creating/implementing a
digital currency that was not going to be secured by crypto - meaning it would have a central authority.
I personally do not see a benefit for "Bitcoin" to have it's own country as it is something that should be able to be used worldwide