are governments really accepting? thank you for answering
I think government is not accepting bitcoin as a payment if you want to buy an island because they don't recognize bitcoin as a legal currency and it depends on the country if they have a law about banning bitcoins but if you have a lot of bitcoin you can exchange in to real money then go buy the island that you want.
Wow! OP really has that kind of resources to buy himself an island? great for him, well apparently I think you can surely buy your own island by exchanging your bitcoin with fiat money, but how would you buy an island using bitcoin directly, well In my opinion I think what you would need to find is a person that owns one, and accepting bitcoin as a payment, there is no need to inform the government that you will buy one, or if that island is possessed by a group of people then you need to pursue in buying it to all of that people, because the needed part of buying a land is the title of that certain land.