The IMF are an arm of the US "diplomatic" apparatus. The charitable interpretation of how they operate looks like this:
1) A country is doing something the US doesn't like.
2) The country is in some trouble of their own making.
3) The IMF will come and bail them out if they would be inclined to start doing the things the US likes instead of the things it doesn't like.
The uncharitable interpretation of "2)" is "the country is doing alright so the US overtly or covertly causes problems for them so they become in trouble".
Basically, the IMF money is the carrot you get for bending the knee. The stick can be the CIA or other things.
So your claim is that US administration through the IMF is forcing El Salvador to drop Bitcoin as a national currency. The same US administration that proposed creating a "national digital asset stockpile"??!? (per https://www.cnbc.com/2025/01/23/trump-signs-executive-order-... )
The IMF isn't run by the US any more than it is run by Russia or any of the other major members (those that have their own executive-director rather than being in a group that together shares one.)
And, regardless, "you do this, we do that" in no way unusual for the US's foreign policy. Eg, the US military insists on democracy onshore and is mildly opposed to democracy in the middle east. Neutral at best. Any democracy they like in the ME as long as it never votes for any policy that inconveniences the nearest US general.
Basically, the IMF money is the carrot you get for bending the knee. The stick can be the CIA or other things.