Live without fiat?
Obviously, for now, it's not possible as mass adoption of cryptocurrency is still in the early stage.
But as time proceeds day by day many will be thinking about accepting cryptocurrency as payment for their business and services by which will be the reason us to live without fiat and start living using cryptocurrency to get our needs.
Definitely. Here in my country, cryptocurrency adoption keeps on rising but that does not mean that we are now using crypto for our daily needs though we can use it to buy or pay goods and services online offered by some local and international merchants. Fiat is still the usual mode of usage too hard to tell if when we will be totally using crypto as mode of payment for daily basis. One reason people think twice using crypto is it's volatility.