The US should adopt the the Canadian currency for the following practical reasons .
You can readily see the colour of our money , each denomination the 5 , 10 , 20 , 50 ,100 is a different colour . Also the currency amount of each bill is 4 to 5 times larger than the US bills . I also believe our bills are more difficult to counterfeit
Additionally we went to the looney $1and the tooney $2 because it saved us big bucks in not having to reprint the old bills .
Some may not be aware the at one time you had a Canadian in your Minting Dept ,high enough up who was pushing for the colour of your money .
As far as exchange , we live in Aldergrove B.C. and are 4 miles from the US border and buy dairy products on a regular basis even though the canadian currency is worth .$.72 cents compared to the US $1.00 But that should change with the huge deficit being run up by the present and who knows that the Canadian dollar may be worth $1.10 compared to $1.00 US which it was at one time when i was growing up.
Time will tell Don