It doesn't matter what the reserve is when the central bank has the power to prevent the movement of reserves in other ways. This is part of the complexity in

It doesn't matter what the reserve is when the central bank has the power to prevent the movement of reserves in other ways. This is part of the complexity in modern central banking that people don't seem to understand. Many of the things you might have learn in school about how central banks operate are no longer the case. If cash actually flows depends on many factors.