Canadian Retirement Fund?

a few years ago I began saving Canadian coins, mostly out of a like for coins and the local practice of tossing them in the trash. I jokingly called it the Canadian Retirement fund, as a joke and purported it to be the easiest way to acquire a retirement based, minimal yes, but it was a joke. Now, however, the exchange rate is near 1 to 1 and this useless currency has a value. How easy is it to exchange foreign currency, and do you think the loon could still rise even more? Yes, this is both serious and joking at the same time. I am amused at how my joke is playing out.