As the article points out, El Salvador is using this as a way to bootstrap improvements in energy distribution and transmission. El Salvador's original point f

As the article points out, El Salvador is using this as a way to bootstrap improvements in energy distribution and transmission. El Salvador's original point for mining Bitcoin was that the area where the power was made it hard to get that power to other places. Mining Bitcoin enabled making money off of that isolated power source and creating an economic zone near the volcano which would be supported by the people working on the project.