Most people use plain old fiat currency every day and have never tried using cryptocurrency.
A few die-hards use cryptocurrency exclusively, refusing to use fiat at all costs.
The majority of crypto users (myself included) frequently use both crypto and fiat. There are still many people and businesses that don't accept cryptocurrency. Not to mention the wisdom in diversifying your portfolio into non-crypto assets.
But what if you were forced to choose? Would you use only fiat? Or only crypto?
P.S. bonus questions: what characteristics made you choose that? What features will you miss most about the currency you won't be using?