Well, there's always the bizarre weirdo's who believe we can design provably fair and cryptographically secure decentralized cosmopolitan egalitarian societies... but no one should pay these people any attention right?
That is a cold war if you do it at the national level. It is basically a trade embargo.
When you refuse to do business, and "encourage" your allies to do the same, then the other side begins to think that perhaps it may just be easier to take your resources by force.