That is a bit harsh, we need it for the less fortunate people? there are a lot of computer illiterate in the world, do you think that will stop them using such currency? And, why will they need to use a computer by the way if they can use it or either withdraw it in a bank or ATM machine. I think you are being ignorant on other people what might do, and the future of the paper money might be vague, but we all know that paper money will stay as it is. Bitcoin might not be a good currency if it's price continue to increase, it will be just an asset for investors, if you think of it, most people look at it, as an asset, not a currency.
While there are people who are still using paper money, we cannot eliminate it in the circulation because the government will
have to consider the majority and the less fortunate people, and correction, even rich people uses paper money.