These are technologies that predate written records (did I mention writing as another example?) yet they all remain use and are actually fundamental in our daily lives. I am not going to claim that fiat currency will be so enduring, but I see no reason to assume that it will be replaced by anything short of a post-scarcity age.
"All technologies eventually become outdated"
There are easy counterexamples:
* Wheels
* Fire
* Knives
These are technologies that predate written records (did I mention writing as another example?) yet they all remain use and are actually fundamental in our daily lives. I am not going to claim that fiat currency will be so enduring, but I see no reason to assume that it will be replaced by anything short of a post-scarcity age.