You mix things up. Most of the tech you describe is about making sure that bank note is not fake. The tracking part is ad-hoc and shoddy, works only in dense ur

You mix things up. Most of the tech you describe is about making sure that bank note is not fake. The tracking part is ad-hoc and shoddy, works only in dense urban settings, closed systems like banking or a big supermarket. Cash usage itself is anonymous.