Then why did El Salvador adopt Bitcoin as legal tender? If it did it, any other country can do it. It's just that most governments are skeptical of using Bitcoin as a currency. They prefer people to adopt it as a store of value just to "prevent" BTC from gaining dominance over Fiat. So far, their efforts are working as Fiat is still King. I wouldn't expect things to change anytime soon.
El Salvador has accepted bitcoin as legal tender but still uses USD as the main currency, they dare not eliminate USD and only use bitcoin. Furthermore, bitcoin is no longer a legal tender in El Salvador as of February 2025.
More importantly, many surveys show that 93-95% of people do not want to use bitcoin as a currency, the majority still only use USD as currency in El Salvador. Therefore, the government does not need to ban people from using bitcoin as currency because most people do not want to use it that way anyway. Bitcoin is too volatile, transaction fees and transactions are sometimes slow, it is not suitable for daily domestic transactions.