I think so, at some point. Maybe it will be used for larger transactions where on chain fees are high or there is no enuts/ecash/chaumian mint available.

I don't really know, which is why I asked this.

In a gold mining town in Venezuela, gold is used for retail. But that's an edge case. Perhaps it will be used in places without a tech infrastructure, for example in those Caribbean islands where coconuts are currently used as currency.