This is why “it’s just like cash but better, and humanity has been using cash for centuries” is not a valid argument for adoption of cryptocurrencies. Cash has

This is why “it’s just like cash but better, and humanity has been using cash for centuries” is not a valid argument for adoption of cryptocurrencies. Cash has fundamental scale-limiting properties; cash without those properties is a qualitatively different beast for which there’s no precedent in humanity’s history. The above argument actively conceals the sheer scope of unknown unknowns.