Comment Re:Fiat demand via taxes (Score 1) 165
Not only that, but the sovereign debt of the U.S. is issued in U.S. dollars. Lots of governments and individuals around the world own U.S. debt, and they are all invested in the dollar remaining strong so as to maintain the value of that investment.
And this ignores commerce conducted in U.S. dollars, like the international oil market, which while beneficial to the dollar as a whole, could probably be swapped out for another currency (the yuan renminbi I assume at this point, given that the euro doesn't look too good) if given enough notice.