I just read this article saying that. U can refer to this url http://news.sky.com/skynews/Home/World-News/Credit-Crunch-President-Bush-Address-To-The-Nation-On-Troubled-US-Economy/Article/200809415106679
what happen if america collape..the world will follow. 
in term of currency tradeing well, for time being never buy usd. it may getting weak and weak…..or better just buy gold…may be 
but be rational in what we do….good luck.
