The idea of cryptocurrencies is decentralized and with paper money, that will not be decentralized.
I mean, it is great seeing someone using those paper money but I don't think people would like anyone seeing paying and bringing this money in their wallets. Digital currencies with physical representation ia not digital for me.
Absolutely. You call it digital currency and yet you are carrying a physical representation. What is that? That is like we did not make progress at all. We are trying to do away with physical money and shift into the digital way and yet here we are trying to come up with a traditional way of doing things.
If and when there is a paper Bitcoin, ETH, LTC, and others, there would also be like the central bank where these paper bills are to be printed. We are not making a single step away from what is happening with the current fiat system of today if that is the case.
But isn't credit/debit cards the same way?
They are actually Fiat money, but the transactions are done "digitally". So in the case of Paper Bitcoin, we could use the same method, a device that has access to your wallet that will permit transactions. That way we don't need to manually operate every transaction (or any exchange/conversion at all). Now you will ask "what are the flaws?", same as hacking/hijacking--what if the "device" was stolen(?), now that will depend on the user and unlike credit/debit cards you have to contact the bank in order to terminate it, but here you are the one who'll cancel the effectiveness of the "device".