Visa is a player and doesn't represent the financial system at large. They're doing this because they realize it's existential that they do.

Look at what regulators will say in the coming days. Europe is already saying under no circumstances will they allow a sovereign currency to operate unabated.

The US Federal Reserve is a major source of American power. It's "rumored" the US has invaded countries before for threatening to price oil in alternate currencies. You think they're going to accept this affront to their global hegemony laying down?