Monopoly Money?

For years Canadians have suffer the denegration of our currency as worthless monopoly money because of its color and poor exchange value. Times are changing. The cratering US$ has caused the C$ to come to within a few hundreths of a cent of par with the US$ today. And, also today colorful U.S. currency is announced ($5 bill to have splashes of purple, gray).

What does this all mean? The Wikipedia entry for "North American currency union" is insightful. Draw your own conclusions.