At the outset, I would like to say: How sad are the figures you mentioned for military spending on weapons in the world, if these huge sums were spent on the poor in the world, we would be able to feed millions of hungry people around the world!!!
In any case, if the Third World War occurs, which is unlikely to happen in the coming years, but if it occurs, massive destruction will occur on the planet and it is possible that the Internet will be disrupted in most countries of the world, so the best solution will probably be to use the satellite Internet, but it will not be This is available to everyone around the world because many countries do not have the necessary technologies and the situation of the Bitcoin network will become very difficult due to the loss of many network nodes that were maintaining the strength of the network and decentralization, and the completion of transactions will become very slow and very difficult and fees are very high.
Strange as it may seem, hunger and lack of resources are actually one of the reasons for war as well. Pretty Ironic because countries band together for climate change, other countries see it like they were stopped from realizing thier dreams of industrialization all because these climate change groups don't have the energy sources like petro and coal. All things can become political in the end regardless of how hungry the people are.
Bitcoin mining energy can even be politicized here. China wouldn't care about Bitcoin actually so why stop and ban everything and what will stop them from unbanning again? Once countries are just negotiating deals and ransoms like Meng Wenzhou or sending home NATO diplomats, the signs are real and you can already hear the war drums!