One reason behind Bitcoin crashing is shutdown of the biggest dark market site - Alphabay. In case you didn't know, it was 3 times larger than Silk Road. Huge amounts of money, plus it wasn't just bitcoin. They supported BTC,ETH,XMR and planned to introduce Zcash as well.
One would hope the downwards momentum in price stops soon!
RE: Bitcoin plunges below $2000, what's going on?