The transition will happen so far the blockchain is not destroyed and government authorities are being liberal to new technologies such as this then we get to see a smooth but gradual transition.

However, while in some countries because of the advancement of technologies over there or the level of exposure of their citizens to either education or basic technological use, it becomes expedient while to those developing countries, they might not get there anytime soon but the sure thing is that they will get there.

My concern however, is that the transition might not necessarily be for bitcoin because a lot of countries sees their currency as their identity and if they want to adapt to a new technology such as this, they would want to still keep that their identity which is the reason why we might see a lot of state backed digital currencies in the near future.