Stuff like this is why I'm wary of any establishment that proudly advertise that they're "cashless establishments".
I don't want to live in a world where people can spy on and control how you use money.
How I use my money is my own business!
cash (especially one backed by debt only) is only marginally better - it allows you to evade surveillance and directed bans, but as in this chapter showed, nothing stops the state from voiding it all - or devauing it, introducing new fiat currency, limiting amount you can exchange, requiring proof of source, inflation, for which we had several examples in history.
that was solved thousands of years ago by precious metals, but our debt based monetary systems couldn't work on that.
You don't need cash if you use a good cryptocurrency, sadly the ones in power successfully convinced the society that it's only useful for scams and that it's "harmful"
problem with crypto is that they have almost zero real world applications, and provide solutions to problems that they introduced and that exist only in the crypto ecosystem.
sure, technology is cool, but for majority of people their only use is as an investment - and their disappearance from the real world would have almost no impact (some people/investment funds would be poorer, and we'd have slightly more spare electricity), and that is why they IMO fail as a store of value.
and in case anyone would want to actually use technology, there's nothing stopping them from just starting their own blockchain using existing technology - unless for some reason you'd really need existing community. you can't invent new gold.