Governments already have CBDC and they will be much more amenable to rejecting cryptocurrencies that are beyond their reach. Because governments don't want to take further risks when control is not with them. The government owns the banks and the position of the banks is not to like cryptocurrencies at all which always makes them lose the profits from the taxes created. The habit of escaping taxes to crypto is the only thing that has until now been the reason why CBDC was created.