FIAT isn't just an Italian Car Maker...True story. Even our Country printed a bunch with no backing for it.
The value of cash is the same irrespective of it being in the Bank or you Mattress...
The big issue with Digital Currency is absolute use: Sorry, nobody accepts Cash as it's worthless, but swipe your card to my phone or use your phone to authorize transfer and you're good to go, and you're going to pay Taxes, and you're going to pay Fees, oh there's an arrest warrant out for you, well we'll just switch you off and see how long you last, that comment you made about the governor being an asshole, well your account is suspended pending further review....Whether you believe in God and the Bible, but it has been foretold that no man shall buy or sell without the mark of the Beast. (which could easily be interpreted as exclusive use of Digital Currency) and yes, I do understand that everything in the Financial World is Digital, I can still go down to the Bank and draw out as much cash as my account will cover and folks around the World accept it with a gratuitous smile.