Trumps threat to BRICS is not incoherent or inconsistent with the reality that China now dominates global trade in manufactured goods and commodities and that China can sustain not just N.Korea, but Iran and more recently Russia with bilateral trade and trade settlement outside of USD/SWIFT but is building the protocol/s and alliances to greatly expand that tribute state empire much more broadly. Those protocols are nearing fruition.

This makes it logical for Trump to makes seemingly incoherent threats and do whatever he can to protect and preserve the global monetary hegemony which US still nominally holds because to not do so would allow an existential threat to US empire viability. The US without the seigniorage and rent on money that USD reserve currency status delivers, would be insolvent...very swiftly.

There are now enough nations who have switched to China's side or imminent to, that the situation is as urgent as Trumps desperate threats and blustering measures admit.

He is using bluff and bluster while he can. Has it ended the war in Ukraine? No. Has Putin bowed to Trumps threat of further sanctions. No. Has China bowed to the tariff threats and impositions? No. This is a standoff at or near the end of empire, about who controls global trade, trade payments, resources and territory.