When it comes to small financial transactions, society is at least comfortable people who choose privacy over transparency. Some places have banned businesses f

When it comes to small financial transactions, society is at least comfortable people who choose privacy over transparency. Some places have banned businesses from only accepting card/electronic payments, but I'm not aware of anywhere that has banned businesses from only accepting cash. That said, you're probably right in the long run. Cash is already less convenient, and it's only a matter of time until it's gone. The "transparency" argument will win, for the arguments you've outlined: "tax evasion, money laundering, political fixing, terrorism financing" and anything the government can prosecute under those descriptions. And to add to the list, non-accredited investors having a flutter, people spreading disinformation, people we don't like etc.