Anyone who can guarantee to accurately predict exchange rates could become a multi-billionaire almost overnight :-)
However, the USA has been 'trading while bankrupt' for many years. It's only the dollar's status as the world's prime 'reserve currency' which has kept it artificially high. The euro is already gaining credibility as a 'reserve' but many analysts predict that the yuan will eventually become the prime currency for world trade. As the dollar loses its 'reserve' status, its value is expected to continue to decline, possibly to the levels of the early 20th century, where $50 was worth less than �10.
Chris