I think segwit activation wont push the price to go down, i bealive the price will go higher and higher.
BCC or Bitcoin Cash I think will go down easily because the users are just getting them so they can sell it in exchangers, the only problem is there are still some issues because there are still some risks. As you can see the price chart of Bitcoin Cash now, it is going lower and more lower than ETH now.
I don't think it will get higher again above the price of ETH.