The Federal Reserve Bank is the maker and controller of the USD. The Fed is an international company. The fact that it resides in the United States simply gives benefits to the people of the United States.
If the U.S. decided to shut down the Federal Reserve Bank, they couldn't do it. They might be able to make certain adjustments on how and where the Bank operated, but they couldn't shut it down. The most they could do is force it offshore.
The Fed is essentially international. The USD that it manipulates is probably the first TRULY global currency. It is a currency that is backed by debt and credit rather than value. The major difference between the USD and Bitcoin is that Bitcoin is a PRIVATE currency while the USD is public. The second difference is that the Big Banking Boys do not control Bitcoin directly. This IS because, Biotcoin, by its nature, is a private currency rather than a public one like the USD.
You could argue whether or not having the fed in the US is good for us or not. The faster people divest from fiat currency the faster the feds power shrinks.