By the time you take the steps to redeem your BCC and send them to an exchange, the people who already moved their BTC to an exchange that redeems for them and offers a market, will have already dumped. I'm not quite sure how fast the new difficulty programing will adjust the difficulty downward, so transferring the coins and making the required confirmation may take some time, in the beginning. You may want to wait until the market finally finds a relatively stable price and the network finds a good difficulty, to see if it is worth your time. AFAIK, there is no expiration date to redeem your BCC.