Canada is an amazing country to do business with. Us Polanders often trade with Canadians and you should to. There is no reason why you should do business anywhere else. The Canadian Dollar has hit an all time low and you should be converting your dollars into Canadian.
You can make tons of money trading with Canadians since most dollars go much further than the CAD seeing as it has never been as low as it currently is. Any American or European can make a killing trading Canadian stocks or just doing business with Canada in general since most dollars will get more than a single CAD.