please everyone stop placing orders around 666 its freaky
I assume someone think's they're being clever and manipulating the price to ensure it sticks around $666. Considering the amount of religious nuts out there, they probably think this will have some sort of negative effect on people's opinion of Bitcoin. It's not the first time we've been stuck at this price.
Or not. Who knows

your cult-like belief that this is not the work of Satan's influence is duly noted.