As a nation America has to become used to less luxuries and amenities. The entire American ethos needs to change. You are no longer the top dog. I mean if the Australian dollar can stay above parity with the US dollar for over 8 months (something that has NEVER happened before) and we are a country of only 22 million people then some serious questions need to asked regarding spending and investment in your country. You are a wasteful people (as a general rule) and you strive for excess. You don't invest anywhere near as much (percentage) into your own economy as other countries do and you haven't developed a single competitive industry since the arms race. You can't even get things into space the cheapest any more.
I''m sorry but I think America is pretty fucked.
Even if the dollar goes through hardships it doesn't change the fact that the dollar is still the world reserve currency. America is still the largest single economy. Still dominates many of the industries it always dominated. It has the largest tech hub in the world. Largest naval base in the world. Largest film, Music, & Video game industry by revenue. It has had more scientific output than the majority of present Europe (& Australia). America has not lost its place as top dog. Even though lots of people seem to be trying to rush its time, lol. One of the great things about America is its a cultural labratory. Part of the reason its enjoyed so much success and was constantly innovating was because of this. From the music that came out of to its inventions.