The IMF and World Bank can be a real pain in the a** for small countries. Bukele and his administration have made a bold move in legalizing Bitcoin and it's had positive effects on the country's development. As for the next leader, who knows what will happen. But, at least the foundation has been laid and it's up to the next guy to build on it or not. And you're right, let's call it what it is - Bitcoin. No need for all this "cryptocurrency" nonsense.
The next person will also continue what Bukele has done if the next leader has felt such a good impact on his country through Bitcoin. And the next leader will not forget Bitcoin just like that when he sees better developments in his country after adopting Bitcoin.
So I don't think this will change in the next leader because the people of El Salvador have also agreed to this. After all, the residents there can also be used by trading via Bitcoin to circulate their capital and make a profit and that can be an additional job for the residents there.
More than that actually I think.
When we are in an environment where everyone has started using a certain system for several years, obviously it will become dependent and if there are new people who want to change it, it will obviously be difficult, as well as in this case, when a country that has almost all felt the impact of bitcoin then indeed when there is a new leader who goes against the grain then indirectly he will find it difficult especially the people under him have also felt the impact of bitcoin in their country.
Things like this still work but if it does it just throws them into a mess I think the new people will be smarter. The system now only needs to continue to change the whole thing to make the country become chaos again.