Doma, I hope you understand that my comments about fiats and holograms are in jest and not intended as mocking. Seriously.
I do not dispute your assertions regarding a house of cards . I do not.
For me, the nature and benefits of the current system involve risks, many of those risk can be significantly diminished by restricting participation less risky asset classes ... the last to fail classes.
Sure, you are correct, should the consensual artificial system of value reservoirs collapse, then my assets will. I don't see a house of cards falling all at once in one indiscriminate uniform boom.
In the past some reservoirs survive better than others.
There is no doubt that your notion that a soft shiny metal holds up better than others when things get ugly. If they get even uglier, then the fact that such shiny stuff has little nutritional or heating value would eventually carry the day.
My interpretation of circumstance is such that I will participate in this consensual fiat thingy, and should it fall apart, I want things like seed, wood, fuel, and stronger metals than the one you mention. For me it is a more massive transition. I find your adherence to the shiny metal and adherence to that which you call fiat and false.
The value of gold is false.
You may be correct in that some sort of collapse will favor those who hold bullion, in other words those that continue to hold onto reserve currency notions (or reserve metals) but in such a circumstance, I expect I would likely transition fully to those things with real value. A pound of steal is simply more valuable to Cro-magnon than a pound of soft pretty stuff with marvelous conductive properties.
So for me, I play in this space, the one of agreed upon retained value reserves, should it fail, I seek wood, steal nails, crop seed, and fuel. I don't ever see myself in the middle spot you mention, the spot of a shiny metal with false value. I am in currency, or I am in true value barter.
It is not to dismiss your notions of whether the currency world I occupy could not completely crash or that I hold some sort of ignorant sense of security in the asset base I hold in that world.