I think it will simply become impossible to keep digital payment systems secure. The whole online economy will collapse. Amazon will become worthless. People will actually have to go out to local stores to buy everything. People will have to go to their local bank or currency exchange to cash their paychecks. The credit card system will fail completely too, while payday loans will take their place. The stock market will have to go back to traders yelling their trades to each other at exchanges. The old ways will become new.
Credit cards are a trillion dollar industry. Fraud is already a massive issue and it’s only grew. More and more places are going cashless for easier accounting and lower incidence of local theft. I highly doubt it’s going anywhere. It will become more of a hassle for consumers though - no doubt.