In few hours, Bitcoin difficulty will increase by about 8% (for the next 2016 blocks):
https://bitcoinwisdom.com/bitcoin/difficulty
In the meantime BCC miners have carefully reduced bcc difficulty to noe 13% of btc difficulty. With just another diff reduction it will reach 11%.
If prices stay where they are, or if bcc goes higher, this will end up making BCC more profitable to mine than bitcoin. If this happens, miners will switch to BCC, and the btc chain will be starved. Very slow congested blocks, moving your btc could be very slow and require super high fees.
As more miners switch over for profit, this could reach an extreme situation where the btc chain could even come to a complete halt.
I honestly how this will affect prices, if btc will crash while bcc rises. But I'm just warning you, if you're planning to move or sell some coins or do some operations, do it now before all hell breaks lose. The great mining war is about to start.