Atm has been disappearing for years now (not completly

). With the Covid crisis, people were encouraged to pay by CB on the pretext that banknotes could carry viruses. Some banks refuse cash deposits and withdrawals.
What is CB?
Those practices during pandemic and when there was no vaccine for the world population are vital to control the virus spread and minimize infected cases, severe cases and deaths. It returned to normal gradually since the world had vaccines and started to massively vaccine population.
Some currencies are worthless: sometimes they're used to fuel fires, or to create bags (Venezuelan bolivares, for example).
Those fiat currencies from such countries are different. They are bad nations with serious economics, political crises and failed to control inflation. Those hyper inflation in those nations even appeared years before a pandemic outbreak.
What does the future hold for cash, and can btc become an alternative?
Bitcoin will become one of alternative, like CBDCs and altcoins, gold, silver. It will never be the only alternative for cash and cash won't disappear globally in financial flows.