I also come from a ‘small currency’ highly developed western country – Australia. The difference is, the AU$ is one of the most heavily traded currencies in the world, due to it being a proxy for minerals and the Chinese economy. It’s not unusual for movements of 10% within the space of a couple of months. It appreciated 75% against US$ between ’09 and ’11 and dropped 35% between ’13 and ‘15.
While all three countries being talked about (AUS, CDN, NOK) have a fairly similar economy (highly dependent on minerals and resources), Norway has a massive sovereign wealth fund to help your economy ride the ups and downs. I don’t know the ins-and-outs of this, but does it provide some security to the average citizen in the street on a day to day basis?
What Australia doesn’t have, compared to Canada/Norway, is a huge single currency market on our doorstep, who is far and away our main trading partner. I’ve never really considered it, because it doesn’t apply to me, but can this act, in part, as a defacto domestic market when considering asset allocation? Surely many of your domestic companies would derive most of their earnings in the neighbouring market anyway.
Either way, I treat currency fluctuations as something that will come out in the wash in the long term. Obviously this only applies to developed, stable, western(?) currencies where the value tends to fluctuate around a mean. In the short term, it provides a useful, somewhat uncorrelated to other fundamentals, volatility that makes rebalancing more important and more beneficial to long term performance.
As to living off foreign currency investments in FIRE, I think of it as a hedge in itself. When local currency is high, foreign investments go down, but so does the cost of imports and international travel. In small economies, imports make up a large portion of what we consume. It would be impossible to get it exactly right and make currency movements a zero sum game, with respect to personal budgets, but there is that dampening effect there. Of course this isn’t the only reason for investing internationally and so other considerations need to be taken into account, but it’s a nice side effect.