Yep, unless there's a WWIII or the US performs some kind of financial wizardry, it seems inevitable that US citizens are going to be using Canadian dollars or Mexican pesos (or maybe euros) as their preferred currency.  But somehow I have a feeling that none of those things are probable except for a war--and that's frightening.

With regard to silver and gold, I'm not sure their recent rise is tied to deteriorating economic conditions.  That could be the case, but if you remember the years leading up to 2011, it was really just speculation that drove gold and silver to all-time highs (though silver had reached $50 in the 1980s because of the Hunt brothers if I'm not mistaken).  That might be what's happening now, because asset prices have been rising across the board for some time now, with metals lagging stocks and crypto for years.