Paper money has gradually been replaced with a more practical and convenient use of debit and credit and cash cards. Paper money is really obsolete. It should have been replaced long time before. This is a more modern world and we can easily survive without paper money. Well, we are turning into a cashless society. As you have said, you were able to survive in the past 8 years without ever using paper money. That is a proof that it can be implemented. However, digital currency will take time before fully replacing the fiat system. This is a different issue already.