I think you mis understood a bit of my post, when I said people will use a common currency I meant a currency outside control, Bitcoin is outside the system not as much as Monero but still widely accepted and you can't ring up the ceo of Bitcoin and call them in for a meeting like what happened to apple and last week Zuckerberg, so there will always be people outside the system so long as they agree on a currency which is not centrally controlled which is another reason that the recent cash ban won't work for the black economy is they will find a new common medium of exchange.The central banks will bring out their own cryptos for the masses but there always be a minority who won't conform and rightly so,
(I will be one of them). I agree with the issues with the euro it's not a level playing field, I've travelled a fair bit around Europe and it's very unequal.
