How would this help if the companies behind this can be controlled by US, if you are from country X and US decides that from tomorrow we do not do business with

How would this help if the companies behind this can be controlled by US, if you are from country X and US decides that from tomorrow we do not do business with X then you are fucked. So you would have to keep a very amount of value and crypto and transform it in real money , gold or something material ASAP. Were there any wars fought for money and not for something more material like resources,lands, strategical territories, ideology ? If you are referring that weapon makers need wars to make money then crypto won't fix that anyway