Yes, Bitcoin has really given El Salvador an alternative investment and payment platform. It has been reported that its adoption of Bitcoin as a legal tender has attracted tourists to this nation, thereby increasing the income gotten from the tourism sector.
But the tweet you quoted was specifically for the nation's success in making El Salvador safe and not about Bitcoin. El Salvador was ravaged by gang-related crime and the government has done a very good job in limiting their activities to a large extent. President Bukele understood that for his nation to become a Bitcoin hub, it must be safe for investors and Bitcoin tourists.
I am sure in a few years we would begin to see the positive contribution of Bitcoin to the multi-dimensional development of El Salvador.
In El Salvador process was not done the way it was supposed to be, the government should have created the awareness of Bitcoin and it's benefits to the citizens before the adoption. It was lack of knowledge that made the citizens withdraw to 10% of it's users when Bitcoin plummeted.
The government should have study her people and understood what should have came in first before the adoption of BTC.
El Salvador has gone past that stage now. Currently, people are aware of the benefits of Bitcoin and more awareness is still going on. Now it is up to the citizens of this nation to choose between fiat and Bitcoin. Those that are interested would definitely grab the opportunities and options that Bitcoin offers.
In my opinion, we may not see the effect right away of btc being the legal tender in El Salvador.
It may be few years from now, because this development within their country is like work-in-progress.
We should not expect something superb will come out just few months of its implementation.
But if their tourism sector is gaining from this initiative, then, at least, they are already seeing positive from this decision.