Cash = anonymity as credit card companies sell your data to Facebook and anyone else...
I understand anonymity from my wife, but do credit card companies really sell your data? and Swish which is operated by the banks ?
First thing that popped up: https://www.businessinsider.com/credit-cards-sell-purchase-d...
So, we know they sell anonymized data. We don't know if its easily de-anonymizable because that takes some studying, and we don't know what else they are selling they don't tell you about.