But they borrowed $1.4 billion from the IMF in December last year, so I feel that they used the loan money to buy bitcoins, even though they promised the IMF not to use public funds to buy bitcoins.
This is a strong speculation although there is some sense in it I still don't think it is possible. Even El Salvador should know that Bitcoin and the crypto-currency market is very volatile and using borrowed funds to buy Bitcoin has its setbacks.
El Salvador might be a small country but I don't think they should have any problem getting one Bitcoin a day looking at the current price of Bitcoin. I believe they have serious Interest in Bitcoin and they can easily channel the country funds from else where into purchasing Bitcoin.