This is a topic I wish I knew more about in that it would be very informative as to what the elites think the future holds. There was a time that I’d of been real big on New Zealand and Australia as locations, but not so much anymore. Not with China’s vision of empire. Too few people, too little in the way of military capabilities to do anything more than try to negotiate a deal that allows some degree of self rule as one of China’s protectorates.
I have read of the super rich buying large tracts of land in South America. My guess is that most of the bolt holes are within the US though. The tough part is differentiating between vacation homes in a good location (by prepper definitions) and properties bought specifically to serve as a refuge.