As to Tuvalu, indeed, the islands are under high risk of sinking into Pacific. They have even tried to buy a piece of Australia, but ausis declined a helping hand.
Certain.ly the government has accumulated some cash for this potential case of emergency but is not willing to let it be distributed among the people.
Well, for the in-depth picture we need to find some true Tuvalian.
I only hope that ccTLD does not disappear if the country ceases to exist.