Yes, of course, we are afraid of the World without Money. Because in this world everything depends only on money. To meet our daily needs we only need money. To buy something that we want, to buy food or buy anything definitely just needed Money. That's why we can not just drop the money. Money is precious to the lives of all of us.
I do not think that we should worry about it, because in modern time as all the people are going to use internet and that is the fastest way of communication with each other, so we are expecting that it will be more easy for us to use online currencies as compare to fiat, although some people are worrying about the internet but i think that is now an important part of our life and will present forever.