Bitcoin continues its wild ride, rocketing past 19-thousand U.S. dollars for the first time on Thursday before falling sharply to around 15 thousand dollars and it's currently back on an upswing.
The price fluctuations come just days before the upcoming launch of the first bitcoin futures contract, which is fueling investor interest.
Bitcoin began the year below one-thousand dollars and has surged more than fifteen-fold in value so far.
Proponents say Bitcoin is a good medium of exchange and a way to store value that's not subject to central bank manipulation.
But critics warn that the price run-up is a bubble that has been driven mostly by speculation, leaving Bitcoin vulnerable to a sharp reversal.