If you are a government employee, how should you explain Bitcoin to your government? How to explain his volatility? How to explain his anonymity? The most important thing is, what role does he have for the country.
I'd explain Bitcoin as it is, a decentralized system with its own currency which has a fix supply which makes it immune to constant devaluation. I'd say it is censor-resistant and permissionless and makes people more independent and free. I'd say it works beyond the frailties and incompetence of humans. Well, it is volatile but it will probably reach a certain level of stability by the time it has reached a much wider adoption. As to its anonymity, well, cash is anonymous.
Its role? Well, it should be offered to all citizens of the world as an alternative.