I’ve never been asked to show funds on visa exempt, tourist visa or DTV. People having this problem probably wear pajamas and flip flops at the airport and otherwise look like a bum.
Actually cash has something called serial numbers. It’s very traceable. Irony of supporting government issued toilet paper that devalues your earnings/savings in the name of freedom and privacy lol
If you want to act like a grandpa in an increasingly cashless world that’s fine but the rest of us do like the 2 second scan option without collecting worthless coins no one wants to exchange.