You see now indeed that there are now more people that is using Bitcoin as their payment method and that is really nice for the currency itself of course but there are still a lot of people that is using paper money.
So it is not that bad for paper money and you have to make Bitcoin more popular if you want to let it disappear.
I am sure there are really a lot more still using paper money. Specially those countries that are not developed yet and some countries that are not rich. They cant afford some technology things and cant even have a good education about how computer or a smartphone work.
That's true and they really don't care about bitcoin as they are not aware and even if they are aware they don't know how to use it because of lack of knowledge.