didn't it crash already? before the invasion of iraq, a canadian dollar was worth about 65 abraham lincolns, and now the loonie is worth 93 murkan cents (down from the november 2007 high of about $1.10)...the us dollar hasn't done very well against the euro either

hopefully the US dollar won't crash against other currencies because they were dragged into the US subprime crisis too...besides, most of the rest of the world still has to buy their oil and many other commodities in US dollars so they have to buy and maintain US currency reserves...the US dollar is still king (for now)

canadian loonie worth $1.10 US - a 70% increase in value over five years:
The Loonie Takes Off in Canada - TIME