I was scared for the future of paper money, because if the crytocurrencies not stopped to become famous in the whole world. Sooner of later paper money has been vanish, but I don't expect that it happen due paper money was symbolizing each country.
Paper money is a symbol of the currency. So I think though bitcoin or other digital currencies are becoming popular and widely used. I'm sure it will not make paper money disappear but certainly users will use more digital money