https://www.reuters.com/article/us-el-salvador-bitcoin-dollar/el-salvador-to-keep-dollar-as-legal-tender-make-bitcoin-optional-trade-minister-idUSKCN2DJ2JU >The U.S. dollar will continue to be legal tender in El Salvador with bitcoin transactions by choice only, the nation's top trade official said on Monday, after President Nayib Bukele faced criticism for aiming to adopt bitcoin as legal tender.