Countries such as El Salvador, for example, have explored Bitcoin alongside traditional financial systems to further strengthen their economies, and their scope continues to grow.
El Salvador's economy can grow because Nayib Bukele is an iron fist president, he really care to combat against criminals, that's why he caught many people that have sign like a criminal, he might caught the innocent one.
Remittances are very important for the progress of a country. Bitcoin can play a real role in reducing the fees and time of traditional services when citizens of one country send remittances from another country.
I don't think this is correct.
Sure Bitcoin is cheaper it terms of foreign transactions compared to banks, but it's a case for the citizen, not the country. The country actually get benefit if the citizen use banks instead of Bitcoin.