It's because central bank are know how much bitcoin can help the people and the country economic, but i didn't understand why they didn't allowing full adoption of bitcoin operation as legal currency, one thing i senn the reason is because bitcoin is threat currency to become banks are die.
Actually bitcoin can be operated to help banks better but there are still many banks that lack confidence in the presence of bitcoin so they cannot allow the full adoption of bitcoin operations as legal currency so there is likely to be one reason because bitcoin is a threat currency to become a bank.