People don't even use cash anymore. This isn't the 80's. Everyone's switched to credit cards so if the government had any excuse to get rid of cash, they could've used it ages ago citing it's obsolescence.
cash is still often used as a transaction in non-modern markets, and occurs in developing and poor countries.
only a few developing countries that have advanced in the internet network, have done transactions not using cash and have been replaced with electronic money.
in my country credit cards are rarely used because there are a lot of burglaries so they have to innovate so that they do not often happen burglaries by replacing signatures with pin numbers. now many are moving to electronic money with good innovation and more prizes than compared to credit cards that actually have to pay a fee again for each transaction.
indeed, in the current situation reducing the use of cash is strongly recommended, but it is not possible to eliminate transactions with cash. there are still many who make transactions with cash.
in my country the perpetrators of corruption use cash instead of carrying out non-cash transactions through banks. because if you use non-cash will be easily tracked by the state on transactions at the bank.