IMO.. what will happen if all countries convert their currencies to cryptocurrency is that the price of Bitcoin will be even higher.
Paying virtually is very convenient for me as I do not have to bring cash and it prevents petty theft but what is the disadvantage?
I have started using payments more often via digital money, as far as I experience losses there are almost none, even I have lost my smartphone and all the money in my digital wallet is safe and can recover again.