Okay I read too much are really believing that it is bitcoin that will be the main money.
Think again. I think we are better than that.
Bitcoin relies with the internet. Paper money dont. It is still the easy way to transact specially with retail stores and with buying food in vendors outside of our houses or in the streets.
Look, what will happen if suddenly internet collapse? Then you will go back to paper money? Or you will do the old time trading with clothes for food or some gold for food? It will get harder to trade again without it.
There are definitely some people who believe far too much that Bitcoin will become the main currency for everything, and simply put the chances or it happening are very minute and incredibly unlikely, and I do think there needs to be a dose of reality every here and there.
The internet collapsing is unlikely, however possible, but then it would be all goods related. Those who have something will trade their thing for what they want or need for something that someone else wants/needs.