I think it's only holding up right now because you can't actually transfer any BCC to an exchange.

So everyone pulled their BTC out to a private wallet for the fork and exchanges aren't accepting BCC deposits yet so the only real trading is happening with coins that were given to users by exchanges that supported the BCC fork, like Bittrex, and gave users BCC directly on the exchange.

So right now you have a ton of people holding BCC that can't get it onto an exchange to dump it.

We'll have to see how well it holds up once the market actually fully opens and becomes liquid.

My guess is that it's not going to do to well, but who knows!