if all switch to virtual currency, then what about real money conditions whether each country will stop making real money in the future I don't think so ... !!?
it took a very long time to be able to divert the use of real money into digital money, the biggest obstacle being the level of technological progress of each different country. if in developed countries it is very easy to realize the replacement of real money into virtual money because it is supported by good internet connections and other adequate supporting facilities. but if we are in a country that is inevitable especially in rural areas that have not been touched by advanced technology, everything is very difficult. so it still takes a short time to be able to change the payment instrument.
So if it is about uneven value of crypto in each country so we know even real money does not have the same value in some countries so it does not matter according to me the most important things is acceptance and the value that needs to be, as much as can see in future people will surely prefer using crypto currency more than really money because it will be need of time.