If and when cryptocurrency and/or bitcoin becomes the official currency of the world, do you think there will be a downside to it? If so, what do you think the negative effect will be once cryptocurrency becomes a worldwide currency?
In fact, even now there is no world currency, because no country ever recognizes world currency.
This is due to the fact that currencies, that is, money, are always closely connected with the government and the economy of individual states.
To create a world currency will have to destroy this barrier.