$ETH
$ETH The virtual currency was defined in 2012 by the European Central Bank as "a type of unregulated digital money, which is issued and usually controlled by developers, used and accepted among members of a specific virtual community." The U.S. Department of the Treasury briefly defined it in 2013 as "a medium of exchange that works as currency in some environments, but does not have all the characteristics of real currency." The main characteristic of a virtual currency according to these definitions is that it is not classified as legal tender.