The 2008 global financial crisis, the Greek debt crisis, and the growing financial needs of a growing number of national economies have raised questions about the central bank that monopolizes the issuance of currency. Perhaps considering these issues, the International Monetary Fund (IMF) recently published an article on cryptocurrency, which unexpectedly called cryptocurrency or would become a "future currency."
So, is it possible for cryptocurrencies to eventually replace fiat money and the central bank. But teare are also some questions about this issue, including:
1. Will this shift reduce the market demand for central bank currency?
2. Will this change affect the ability of the central bank to control monetary policy and interbank lending rates?
3. Will this change allow the central bank to start designing interest rates for encrypted assets as well?

I think the central bank will not be replaced in the early years before these issues are confirmed.