First most currency is already in digital format. have you used a credit card or debit card? Now... What backs the currency? Nothing!!! The only thing you can really say is that confidence backs a currency. And when confidence is gone so is your value. Look at Venezuela. Those poor people are eating pets to stay alive. So What I was saying was saying in the article was not to pin your dreams on crypto but to just put a little into it just in case it goes to the moon. Also I don't see crypto as a perfect currency but it is better than we have now. And one last thought... Crypto is still young. As confidence builds in it more people will use it. Finally, thank you for your comments. It made me think a lot about this response. :)