@rvkennedy @JorgeStolfi @kcoyle @immibis @pluralistic @funcrunch that's got a number of things jumbled.
The debt ceiling has nothing to do with the central bank or printing money, it has to do with the government issuing bonds (taking on more debt).
The dollar value drops internationally because a failure to raise the debt ceiling also means the government defaults on it's debts. It's international debts are still in USD, so those debts are worth less if the US threatens to not pay them.