&gt; Bitcoin Was the Top Performing Currency of 2015<p>The functions of a currency are as a store of value, a unit of account, and a medium of exchange.  So let&#x27;s see, is this article saying that:<p>1) Bitcoin had the most stable value among currencies?  Oh...no.  Bitcoin&#x27;s value was quite unstable.<p>2) Bitcoin was the most widely used currency?  Oh...no again.  Bitcoin is not widely used, and it&#x27;s difficult to compare items using Bitcoin prices.<p>3) Bitcoin was the easiest to exchange for goods and services?  Oh...still no.  Bitcoin is not accepted by many merchants and service providers.<p>Apparently there&#x27;s a new 4th role for a currency:  Ability to let lazy journalists write misleading headlines.  I suppose Bitcoin might actually be the best at that.