In my country, it is possible to pay utility bills and do shopping in supermarkets using cryptocurrency (although not directly, first you need to convert your BTC to gift cards). But even here, some of the payments are not possible in cryptocurrency, such as rent and housemaid salary. For these we need fiat cash. In case I receive 100% of my salary in Bitcoin, then I need to convert at least some of it to fiat in order to pay these bills. And in my case, a large part of my portfolio is in BTC and therefore I will not prefer to receive anymore amount in cryptocurrency.
of course you guys can never YET live without fiat, at least for now.. as the mass adoption wont takeover in few days, it takes decades and we are working on it day by day, building a strong huge ecosystem.
if u live in a solid crypto environtment you might could do this.
using crypto as a whole in our daily activities, but not today.
crypto still widely known as an asset rather than a money though.
you cant buy bread with crypto anywhere anytime for your daily needs, theres might one but not much.
the point is thst the work are in progress.