I think the price is falling because one or two individuals have dumped millions of digibytes, nearly a couple hundred BTC worth since it started falling. I guess they feel the price hasn't dropped low enough to buy back in again and I imagine they are now sweating more than most of us in here.
I guess 50 was the last trigger for the stoploss level of some last souls still invested after the pump 2 weeks ago. Take teh winnings and goodbye, take the coins and coldstore them. Without a ralley in sight they might be right.