Although we are entering an age where everything has its digital version, I don't see the paper money being obsolete. It is still nice to have physical forms of money. The increasing transaction counts using digital money and online payment has reduced the need to bring cash but there are still things that are better off being paid by paper money.
I agree with you that even though the future later today or digital currency has become a frequently used and become mainstream, but I think that paper money will always exist, no matter what currency symbol is paper money #imo
It is going to remain to exist and will be used by most of us. Because there are some considerations that government will not going to totally adopt the digital currency or else they will create their own digital currency or local online currency that will be able to manipulate by the government. And digital currency will be a secondary currency.