It's a patently stupid strategy over the long run though. Abandonment of ones own currency is suicide regardless of whether it's USD or Bitcoin. And clearly, Bitcoin did not help El Salvador improve it's financing situation: the Bitcoin bond they tried to push was a complete flop. Argentina has a way better model: they control their money, they've defaulted repeatedly, the currency has magically remained stable, and everyone comes back after each default.

Another massive issue is that as a currency with an inelastic supply Bitcoin price volatility is guaranteed to remain unstable. This is not a desirable feature for any currency.