Although this is still a good thing to celebrate - bitcoin is being slowly adopted by the countries which means we're taking a positive path right there. Hopefully, there would be more countries to follow such initiatives made.
It is too early to celebrate. People are already complaining about this free money:
https://twitter.com/Paolo202019/status/1435364198003924996 or
https://twitter.com/Paolo202019/status/1435355876865495048. I have found this in just a second. If I google more, I'm sure there would be more examples.
This adoption might have a negative impact, as "people were promised that they will receive 30 USD worth equivalent, but with each day their holdings becomes smaller".
This remind me situation, when countries that joined EU changed their local currency to Euro. If the exchange rate of their local currency was greater than 1. (like Maltese Lira had exchange rate of 2.32 MTL per 1 EUR). People were worried, that their salary of 1000 MTL would turn into 1000 EUR, instead of 2320 EUR, while prices remained the same. This is perhaps identical to what Salvadorians feel about Bitcoin. Maybe they are afraid that their salary in USD will turn into Satoshi with 1:1 exchange rate.