Right now I would say Fiat is more important for daily usage as Bitcoin hasn't been widely adopted yet and cannot be used as a medium of transfer in all place but that may change in the future.
But acquiring crypto will generate profit right? That is a benefit. While it is indeed true that fiat is more usable at this moment.
I'd say this won't measure which is more important giving each of these currencies are having their own advantages. One thing is for sure, both currencies are important because these can be used in our daily living It is just that these two are having different support from different governments which makes a Gap. One day, once cryptos are widely used in daily transactions, there will be equality in terms of its usage which will make it more valid that both currencies are important.