I think that's accurate to some degree. If global economic trade were to shut down, it would significantly increase prices because a lot of resource extraction/processing and factories would have you relocate to North America. That has already happened to some degree with Russia/Ukraine.
I wouldn't characterize what Iran, North Korea, and Russia is doing as sharks circling a failed US economic system.
Russia making a play for control of Ukraine and control of FF/agricultural production/exports, is more about their economic reliance on on FF exports/etc and the West moving towards renewables. The fact that they're willing to throw away so much of their military and population on it shows how much of a threat they think it is.
It could also be because of a perceived threat from NATO, but if that was the case they would have backed off when other countries started taking about joining NATO. Instead they doubled down and NATO is more powerful than it was before.
Iran and North Korea and using their resources to support Russia in exchange for technology/etc.
China is making moves to strengthen their economy during all of this, but I think they're acting as opportunistic towards Russia as they are towards the West.
That's why they're being really heavy handed in negotiations with Russia. They know there isn't anywhere else for Russia to sell a lot of it's gas, and they see this as an opportunity to gain an advantage over Russia.
https://www.reuters.com/business/energy/russia-china-gas-pip...