You will know that the end is near when they convert their wealth into cash or gold or stockpiles of goods. A billion dollars' worth of MRE's could keep you alive for decades. Do these "off-grid luxury compounds" have vertical farms? If I was one of them, I would really want to get my hands on a few RTG's like were/are used in NASA and ESA deep space probes. They produce electricity for decades with no maintenance. They are just plug and play no Geek required. Yeah, stocks and bonds will be worthless but there will be things that retain value. When the time comes they need to convert.

TEK