Where? It's still trading over $1000 on every exchange I follow. This announcement seems to have almost no perceptible effect on the price of Bitcoin.
This is an interestingly biased article, actually. It quotes Alan Greenspan, whose history as a stubborn gold bug (in his Ayn Rand worshiping days) and whose pretty awful performance at the Federal Reserve make his opinion on this matter somewhat expected and mostly moot.
I'm willing to believe Bitcoin is overvalued for its current utility. Maybe. But, this article exhibits such a lack of understanding of what it is that I find it hard to take them seriously when they discuss what it might be worth or how this policy in China will effect it.