Our own perhaps? I mean, if each country had its own crypto, they'd see no need to implement payments through foreign countries crypto right? So it'd be just like the current system of fiat right now, but crypto based. Basically a virtual payment system for each country.

Plus, making crypto for a country doesn't necessarily mean that it stands at the same stage as BTC. At first, I thought of comparing the given situation to the current one, where USD is currently the most preferred USD globally. But then I realized, they both stand at different stages. USD is backed by the US, they control the amount of USD in the economy/market while on the other hand, BTC uses a decentralized system. One is fiat and one is crypto, but even if for argument's sake you create a crypto based USD, It would still be labeled as a centralized one.