Naeborra. I had to 'think it over' as well.

It's sometimes useful to see these two sides to monetary measure another way...in terms of price denomination. Fiat currency is really just a basis for denominating prices rather than storing value. Just a number. If people want to store value over time, it's their responsibility to convert their fiat denominated credit (just a number) into a tangible monetary commodity which may be a completely different thing.

For example, if you look around the world, many national currencies have weights, measures or metals as their name. Peseta, Pound, Nickel etc. But these are now just price denomination units and no longer bear any relation to their original commodity base. All the same, it's the commodity you still need to hold to store value. As its value increases, more "denominational units" will be created to reflect that new value.

Here's Christine Lagarde talking about the importance of price denomination in the context of the Remnimbi and the IMF's SDR.