Maybe so, but only in the very distant future, not so soon as you expect.
Paper money will not disappear anywhere and will always be.
yes it should take some time to get away with paper money. but we are all heading towards the future so there is really a possiblity that our money will just be bits stored in servers. If we try to go deep in the past centuries people do not use paper money to buy goods they were trading goods, then it evolved that gold and silver was used to buy goods, until it evolved to the creation of coins and paper money so it is not impossible that our money now can also evolved in the distant future to be just some bits / bytes stored in servers.