Anything below $7K seems like a good value.
Such a dump as today can greatly affect investors and many will consider buying bitcoin. But the question remains whether to wait for the bottom of the coin or take it at the current price.
But no one knows how much the bottom is, so for me its better to buy now and then buy more when its go dipper. A lot of good coins on a cheaper price now invest now before its too late again. But of course do invest on the good coins so you will not lose money on shitcoins.