For the big country like Japan and USA, i think paper money will dead and digital money will take it. But for developed country, i think paper money will be used permanently.
I think you mean undeveloped countries which can't afford to set up the digital money system. For all other countries which can afford setting it up, digital money will be their only option.
If the future will be digital, all countries will have acess, being some country developed sponsor the other, with some kind of interest. I do believe someday the internet will be free for all, soo the equipment to acess will be the things that will cost money just.
so true. The most important is access to bitcoin. with a strong Internet presence will make bitcoin more widely used. paper money will be left behind. but certainly there are still some areas that can not get rid of paper money.