You are completely correct, now the question should be, what we can do in order to protect ourselves when fiat currencies finally fail? And I think the solution is very easy we need to find a store of value, one of the most famous stores of value is gold and while I consider it to be a decent store of value in my opinion is not the best after all you cannot eat or do anything with your gold while if you invested in real estate then you can use that house and that terrain to live there for some time and if you have enough space you could even produce food there in the case things got really ugly.
I would predict that when 'the system fails,' there are multiple possible scenarios that are very different from each other.
The worst one is economic and societal breakdown. I certainly don't hope for that, since I don't know anyone, myself included, who is really prepared for that scenario. Even if you grow or store your own food, it can be taken from you. Even if you protect it with guns, you can get killed. (Also, I believe the other scenarios are far more likely, as the elites actually have a back-up plan.)
At the other extreme, the least disruptive scenario is loss of faith in core financial assets, caused by the collapse of some big asset class or financial institution. In this scenario we still have law and order, and money is still good in the economy (and likely too good,) but the elites will need to take a no. of drastic actions to keep what remains of their system together. Part of the mix will likely be a de-facto devaluation of their state money against non-state money, to stabilize state money. This happened, for example, in 1934, when the dollar was devalued by about 50% against gold (and other currencies did even worse, as they had to be taken off gold.)
Somewhere in between the two extremes would be a change of the global monetary regime. The last time this happened was across World War I, when the US took over global empire from Britain, and a dollar-based gold exchange standard replaced the classical gold standard. Unless the system lives long enough to see a rising India mature enough to take over the role of the US, this option is not available this time. A massive devaluation against non-state-issued money, and/or using crypto as the chief non-state-money (if crypto can mature fast enough in the public imagination,) is the likely response.
The trouble with investing in things like real estate and base commodities, thinking they are 'real things,' is that the demand for these is propped up by the elite-controlled system from day one. So you're not only buying over-priced assets, in a collapse, there's a better than 50/50 chance that the lack of demand from the loss of the asset bubble will drive their values down.
In the two latter scenarios, non-state-issued money like gold, silver and Bitcoin should do well. Among the three, Bitcoin is especially cheap today.
The key thing to remember is that, during 'good' times, the elites always manipulate non-state-money values down (perhaps with the exception of cryptos, since the elites must allow them to rise to a level that makes them a player, but that's only for now.) This presents us with an excellent price level to buy non-state money for the long haul. They won't let good non-state money totally collapse, because that's their back-up plan. The net effect of all this is that we have a one-way bet, for the long term.