And I still haven't understood the essence of the topic or question. What did the author of the topic mean? What military currency is he talking about? It is possible that he had the opportunity to save his money in this way during military actions. If so, then it is quite possible to consider such a scenario. In our unstable times, this is a good way to save money not only from a default situation, but also from high inflation risks.
To move wealth store and pay exchange during the war
The Op didn't explain his topic very well. But from his last sentence, it looks like he is talking about the ease of moving Bitcoin during war or conflicts. Unlike other assets like real estate, physical gold, and others Bitcoin can be easily moved from one place to another without restrictions. All that is important is keeping the seed phrase safe.
Bitcoin also helps to limit the challenges of converting local currency to others. A refugee who owns Bitcoin can easily convert it to the currency of any country he fled to.