but can other small countries follow in El Salvador's footsteps
Bitcoin was created to be owned by everyone from all people who want to have it. Bitcoin is an elctronik peer-to-peer currency system. Transparent bitcoin is not difficult. Bitcoin is also used as an investment asset by most of its users.
If other small countries want to follow in the footsteps of El Salvador against Bitcoin, of course you can.
and what are the country's challenges in this regard?
Criticized by the officials of the banking organization because they could stand negatively against the stability of the country's economy. This can be one of the challenges that will be faced. There are many more reasons that will arise for those who are cons if another small country follows in the footsteps of El Salvador.
If every year there are small countries making bitcoin a legal tender, there will be an increase in the amount of bitcoin adoption and that is very positive.