Jnycat surely you must know that I don't like you also, lol.
you sure know how to poke a stick into a hornets nest. I sometimes like to do that too just to find out where I stand. I did knock down a hornets nest once in my life - every one should do that at least once and the earlier in your life the better, a lesson that should not be avoided - more of my silly advice.

On a serious note;
US dollar while moving up and down on a daily or weekly basis is on a net down trend over the years relative to most currencies. JUst compare to the much maligned by US press, the Euro.
When it started it was well below a dollar in price and now the ratio has reversed and the Buck has lost about half its value relative to it.
My point is that US dollar is still on a down trend and I do not foresee a reversal in that trend for a few years.
Yes you do lose but you lose if you sit on US dollars. If you invest in PM bullion ( the Real money) then your loss is protected or at the very least diminished, that is the conservative view. I am of the opinion that if you invest in bullion then not only are you protected but you should have a significant net gain over the next couple of years in dollar terms.
If you invest in PM stocks then you have a chance of even greater gains over the same time period as bullion. If you invest in a PM stock that trades in a non-US currency then you stand a chance of an additional gain due to the currency appreciating relative to US Buck.

Sooo, I do not understand your logic. If you invest in ECU which is a Canadian stock, I presume your broker exchanges US$ to C$ ( you lose a little on the exchange) buys the stock, you hold, stock eventually appreciates in price, given enough time US$ should be down relative to C$ so you gain a few cents there, you sell and exchange dollars. Lets assume dollar price diference is just to pay for the exchanging of the dollars - You get full value from ECU appreciation.
So how do you lose in US dollar terms?
Where you may not gain is with the Canadian economy being tied by an umbilical cord to the US, the Looney may not appreciate much relative to the Buck and as seen many times recently, is purposly driven back to provide incentive for jobs in Ontario and Quebec. Just wait for the opportune times when the Looney falls and switch into it then?