Even if the IMF wanted to stop El Salvador from buying Bitcoin, I don't think they would ever succeed because they have done this before but Naiyb Bukele has been buying Bitcoin regularly. At present he is doing the same, that is he has been buying Bitcoin despite the ban. As a proof of El Salvador that has not stopped buying Bitcoin at present, you can check their portfolio, that they already have 6101 Bitcoins in the investment portfolio. So it is proved that the country first legalized Bitcoin would not stop buying Bitcoin in any way.
President Nayib Bukele said it all in this tweet that they will never stop buying Bitcoin.
In this case it's left for the president of El Salvador Naiyb Bukele to weigh both options, between that of buying more bitcoins for the future and that of the loan to be given to his country. Or just maybe Bukele must have weighed what he stands to gain better continually buying bitcoin and that's why he has never stopped buying even from the very first time IMF issued him a warning to stop in the way he is going.
One thing is clear here, which is, IMF are just scared, scared they would lose control of El Salvador in the future as Bukele ROI in bitcoin would definitely threaten their relevance to the country's economy. IMF is majorly funded by the US as member country, right? Yet the US is pushing on towards bitcoin strategic reserve but the so-called IMF is trying to restrain another country (El Salvador, athe first country to officially make BTC a legal tender) with a loan clause. Like am I the only one getting the gig here that perhaps someone doesn't want to have a competitor.