As far into the future as I can see, paper money would still be the primary method of trading. As seen with much of the world, many do not have an internet connection, let alone a computer or even adequate shelter. They are required to be able to trade with some form of digital currency, which in this case is Bitcoins. Paper money on the other hand, is much easier for everybody to use. However, once everybody has access to the internet, digital currency will be superior and will take over!
I've just combined two things I've read in the previous posts.
Sweeden wants to be a cashless country. One of my friends' had spent a little time there. If you don't have a credit card, you can't even hop on a bus, train, etc because they really don't use cash at all. One place where they are still using coins is the door lock of the public toilets
Just imagine that you are in a really need and you are about to swipe your card to open the toilet's lock, and the power outage comes
“There are some things money can’t buy. For everything else there’s MasterCard.” or not