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I also think/thought like that. But if banks wanted, they could actually track the serial codes on the bills around. And since often cash is used in only 1 hop

by 317070 9y ago

I also think/thought like that. But if banks wanted, they could actually track the serial codes on the bills around. And since often cash is used in only 1 hop (so ATM -> you -> shop -> bank) they could know pretty well where you spent your money. A quick reference: https://news.ycombinator.com/item?id=9948081 https://news.ycombinator.com/item?id=9948081 E.g. about China: "According to schedule, by late 2015, the serial number of every Rmb100 note withdrawn from banks by members of the public can be traced."

jhasse 9y ago
> But if banks wanted, they could actually track the serial codes on the bills around. And since often cash is used in only 1 hop (so ATM -> you -> shop -> bank) they could know pretty well where you spent your money. That doesn't include how much you spend exactly. And it only works most of the time (what if my money gets used as change for another customer?).