Looking at a 1 yr chart you will notice that Bitcoin constantly get's beaten down since December 2013.
For your convenience: http://bitcoincharts.com/charts/bitstampUSD#rg360ztgSzm1g10zm2g25zv

The November 2013 rise to $1,200 also caused an immense rise in hashing power and difficulty (because mining suddenly was so profitable).
So this correlates.

There is no free lunch, somebody has to pay the immense mining network (electricity, hardware, etc).
It looks like the Bitcoin holders do, because I'm sure that miners have to sell a large portion of mined coins on a daily basis just to cover electricity.
And that's exactly what the charts are reflecting.

Looking at it this way, the downtrend will only accelerate as difficulty rises?