blackrabbit1, it is true that some countries offer citizenship, residency or immigration by investment, but I do not see any country except Antigua and Barbuda, and Vanuatu to accept BTC as a means of payment for that service.
Antigua and Barbuda offers citizenship for 200k USD no return, or 400k USD investment later to be returned to you. They will of course check your background and wealth origin. They do accept bitcoin directly. The money they collect is for their rebuilding efforts, mostly housing projects. If i had that money i would do it right now, but alas...