No problem Cryptocurrency was created digital or not created in a physical but makes it problem is people does not know what a cryptocurrency and how to use so this is one of reasons that cryptocurrency never replace fiat money. cryptocurrency is also a new thing maybe it make some of countries doubt dan choose not learn more.
But over time everyone will learn this very well, because of the demands of an increasingly sophisticated era, they will be forced to know about cryptocurrency in order to be able to carry out their work because the cryptocurrency system will slowly be applied to the state system for countries that have accepted it cryptocurrencies.