It is natural for the IMF to give a warning because El Salvador still has arrears, but at some point the IMF does not want El Salvador to pay early at all and could even become a custodian for other countries if they see El Salvador activities that generate profits from cash flow other than the country infrastructure. The IMF should not ask where El Salvador's money comes from, the most important thing is that they pay their debts.
Why does the IMF not want El Salvador to pay its debts early and does that mean they will cut interest rates on the loans they take.
I think the IMF's fears are too big because they consider bitcoin speculative so it will disrupt the country's economic stability.
The bitcoin reserves purchased at this stage can store it outside the public sector so that El Salvador does not violate the agreement with the IMF.
As long as El Salvador's bitcoin holdings increase in a way that is appropriate without violating the rules of the agreement then they still have the opportunity to accumulate based on the program framework that can be done, this reflects the country's steps in making policies.