I am not an expert of economics, but even I can see that Dollar has lost its value significantly. I am not sure why, but from time to time we see economic crisis and dollar involved in it, maybe because Dollar is one of worlds most used currencies. America is one of economically strongest country, but I am not sure if its economic strength is real. I have heard that US is in debt a lot, that they owe China a lot of money. If they continue on that road of debt, Dollar would be ruined. With everything that America is involved with, its no wonder that Dollar is so volatile.