Oh, really?? No I don't see, and I don't think the millions of people owning U.S. treasury notes, bills, and bonds in their 401k's or other investment accounts have lost faith in it either (thus the reason they keep purchasing them).
And if you were really worried about declining foreign investment in the U.S., you'd support lowering tariffs and other barriers to free trade, but I'd be pretty willing to bet you are opposed to that as well.