SAN SALVADOR, El Salvador — El Salvador’s Legislative Assembly has approved legislation making the cryptocurrency Bitcoin legal tender in the country, the first country to do so, just days after President Nayib Bukele made the proposal at a Bitcoin …SAN SALVADOR, El Salvador — El Salvador’s Legislative Assembly has approved legislation making the cryptocurrency Bitcoin legal tender in the country, the first country to do so, just days after President Nayib Bukele made the proposal at a Bitcoin …