What alternative does the world have? Go back to the gold standard?
The U.S. has more gold reserves than any other country! We would just become the reserve all over again.
I suppose they could switch to a new reserve currency; but why would they do that and devalue all the dollars they already have?
The more sinister problem is that even though we may have the printing press, it may turn out that the money it creates goes right into foreign hands. Whom then use it to buy up our assets/labor at their discretion.