@Pham - the above poster is correct, and yes allowing short selling would have certainly mitigated the damage.I was mining bitcoins long before I came across SR and I know some of the guys (as much as you can know someone on the internet) who had the big rigs running back below $.10/BTC who amassed over 100,000 BTC. They sold alot into the rally and some of them panicked as it started nosediving and dumped BTC into the dive to try to unload. There were a lot of idle coins sitting off to the side that piled on to the decline to try to save face.Needless to say they still made off like fucking kings lol. One guy I know made $500k in 6 months of mining, paid maybe $2,000 in electricity for it lol. Those days are definitely gone, but that old-time miners were in on the decline because a few of them panicked and started dumping.