No, I don't think! The world economy would be massively massively impacted at every level if the world's biggest economy, biggest market, source of reserve currency, and store for most of the wealth of countries like China suddenly devolved into civil war so bad that US dollars had suddenly had zero value and we were going around bartering silver coins. But somehow not short of food and still safe.
The rest of the world wouldn't even come close to emerging unscathed, he'll look what a minor hiccup in the U.S. housing market did to the rest of the world in 2008. And that's again assuming a knife edge one in trillions chance that the U.S. descends into that level of chaos and doesn't draw any other country into it.
We'd all be better served putting our effort into voting for people who are publicly committed to honoring the results of elections and stopping in their tracks those who are not and are trying to destroy faith in our electoral system, than buying silver coins (but only if you can get a good enough deal on them). Don't you think?