Furthermore a currency that is basically a "world currency", like the dollar, Euro, Yaun and others to fall into dust so to speak, everyone should use other currencies for trading and avoid these currencies, which you can't. Why is that? because it is easy, fast, reliable ( to certain extent) because it has a government backing the currency ( which is saying every resident of said country is backing that coin/currency), etc.

I believe that "fiat" currency and digital currency ( though your paycheck is also digital when it arrives on your bank account)will continue to co-exist for a long time... or something catastrpohic should happen ( in the financial sector... like the news that "every single gold bar reserve of the US fed reserve are fakes") then it is likely that a currency potentially "could" find itself in a major "S** storm". Still the elites, banks etc are in charge and do you really think they give everything up without a fight?