http://www.coindesk.com/margin-trading-crash-price-bitcoin/The price of bitcoin declined to its lowest level since May yesterday, falling nearly 10% and ending what had been a long period of relative optimism and stability for the global bitcoin market.
But while there were many theories as to what news events could have caused bitcoin’s value to fall into such a steep decline, some market observers believe that this most recent movement may have been caused not by external factors, but by the actions of bitcoin traders.