Atleast in far future the use of offline fiats will be somehow reduced for sure.
I see that this discussion is between future and past. Fiat is new to the world in the year of 1769 when the time we first paper money but since world adopts to digitalization we will give further to use the bitcoin and other crypto currencies as their national currency but I am really looking forward to know the bitcoin as a national currency if that is belongs to my country means I will be glad more about it.
However, these kind of discussion will goes like rubber band and expand it more than a 10 plus pages by saying the same information again and again.