This is very difficult in the near future. Digital money can not replace cash money.
Crypto money continues to be traded on stock exchange sites. People are using digital money to make money.
In the following years we will see digital money.
Despite made lot of news in the recent times cryptocurrency cannot replace cash or kill cash. Huge percentage of people are still using cash for their transactions, only few group of people are in the crypto, so expecting to kill cash is highly impossible.