The Vikings also engaged in trade with merchants throughout Europe, Asia and the Far East. The Volga and Dnieper Trade Routes were the two main trade routes that connected Northern Europe with Constantinople, Jerusalem, Baghdad, and the Caspian Sea, and the end of the Silk Road. These trade routes were not only brought luxury and exotic goods from the Far East but also an overwhelming amount of silver Arab coins that were melted down for silver and also used for trade.
https://en.wikipedia.org/wiki/Trade_dur ... Viking_Age
them vikings were pretty smart folks.