That is very interesting idea.As for me humanity isnt ready for that in the nearest future)
Indeed true.
Consider any development, cash or paper money will continue to reign the economy. You can't literate whole country and make them use digital means for every need.
I agree with you. Paper money is a habit. People can not give up this. It's nice to listen to the rustle of the bills. And to make purchases in cash - anonymously
Lets face it Cash is still king when it comes to currency. Yes we all have now credit cards, debit cards, and stuff like Apple Pay but all of which is paid or loaded by Cash and nothing else. Even Bitcoin as a currency is still converted to Fiat Currency because as of right now it still has many uses compared to Bitcoin. I can tell you that if the government has not yet come up with a good alternative to fiat then Fiat currency still has a bright future ahead.