Your Medicare is null and void if you plan to retire somewhere else in the world.
in the end I guess it all depends on how fast the collapse is. I am of the thought that it is too late to fix the US and we are in permanent decline. The above comment about texas becoming like quebec is a strong possibility so an option as well. While I am strongly American, the thought of dying in vain is not a welcome thought - especially when I could resettle and teach a whole new continent or nation about freedom and free markets and they would be very open to it, not like here.