Nayib Bukele jump in the right time, he bought Bitcoin when Bitcoin was cheap, he might have been studying the market from few years ago, so he know when to buy Bitcoin.
I disagree if developing countries should buy Bitcoin to change improve their financial, the biggest problem in developing countries is corruption, even the country made 1,000% profit, they wouldn't distribute all the profit, they might only distribute 1% to the public.
If I remember correctly, El Salvador started the bitcoin season in the 2021 bull season and at one point their investment was also damaged when the bitcoin price dropped to $15k in 2022. But with faith in bitcoin, Nayib Bukele planned to buy 1 BTC every day and eventually they got the reward they deserved.
Although El Salvador has made significant profits from investing in bitcoin, they have never used or intended to use it. So I don't think their country's economy is improved by bitcoin but instead I will give all the credit to Nayib Bukele. He is very good at suppressing crime, promoting the economy with the country's available resources such as tourism, labor export...
Bitcoin is a good investment but I also don't like the idea of relying on bitcoin to improve a country's economy. Apart from the problem of corruption, to fix the economy, we need to find out the causes of economic recession and come up with appropriate solutions. We cannot just rely on bitcoin and think that it can save the national economy, the national economy is completely different from the economy of an individual or organization.