You cant really kill fiat.
You can only limit its crippling printing press by switching over to bitcoin, but you still need it to pay bills since the world operates off fiat.
I dont think we will ever come to that point though since most of us will be either to old or buried by then to see it die.
Yes and I think that fiat will never die, there will be many users who will prefer to use fiat even if everything goes digital and they will be comfortable in using it.
yeah that is right no one will leave the world of fiat even if the world system shifted to digital world at all, they will prefer to use their fiat in their local markets and small shops, plus there are some older uneducated people who cannot adopt bitcoin they will also prefer fiat.
Also its impossible to happen and i think government will not accept bitcoin as payment..
Maybe some stores are accept bitcoin as payment but government are not..