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I understand simply because they consider bitcoin as a national reserve currency, a national asset and need to keep it domestically to avoid risks.
For the above I skipped the discussion because the source after source that we searched explained how it should have happened between El Salvador and the IMF.
Hasn't El Salvador already made Bitcoin a national deposit or reserve. That's good because their goal is right given the global economic conditions that are increasingly not finding the direction as expected, instead other countries are still in the planning stage to do so.