What do you think most Bitcoin investors, big real buyers were using the coin for in the first place?
It was taught to be anonymous. Most of the fiat that went into Bitcoin was black money.
Those people are scared shitless. Now comes a new coin, with a new proof of concept, a well done product which just fits that crowd.

What we see now is shifting already. You ain't see nothing yet. When shifting seriously starts it'll be a short staggering period.
When shifting of big BTC and LTC fortunes is done and DRK is convertible for fiat or whatever, the fiat price for BTC will collapse.
The average Joe BTC holder will be very astonished.

I see a justified price of 3-4 BTC for one DRK at the current level of supply. The extreme leverage might even bubble it up much higher for some time.
Its just a state of the art financial instrument, in contrast to BTC or LTC.
The only contender is Ripple, which I see on the bright side of things as well.