I don't think El Salvador can ever be the richest country in the world with mere accepting Bitcoin as a legal tender, as Bitcoin is a worldwide general digital currency, because irrespective it was the first country to accept it as a legal tender, i still strongly believe there are some individual who owns bitcoin more than the total amount El Salvador claims to own. A country can only be said to be the richest when it has both natural and humam resources in abundance that other nations don't have and can't do without it, such as gold, petroleum, and fertile land for agriculture to cultuvate economic crops for exportation. Then such nation can be said to be the richest.