Well if your goal is to destroy the worlds' current economic order and end the US dollar as the worlds reserve currency this would be the most efficient way.
I'm sure the globalist at Davos are doing summersaults. No other nation will ever trust the US with their money again. If you own US bonds, sell, sell, sell.
I forgot to mention all US assets abroad whether government or privet will now be at risk of seizure and nationalization.
If we complain they can just say, Hey you set the standard.
This has been done very often since 1917.
It takes a lot to get into this sort of sanctions regime.
More likely to lead to a BRICS situation is a truly effective anti-Chinese protectionist scheme. Because China IS BRICS, the rest are opportunists and bad actors. And that protectionism is far more likely to come from a Euro-US right.
Btw, BRICS is not looking good at all given Chinas economic problems.