If you think that in the end it's going to help you get more BTC by buying low and selling high, why not? Just be prepared that it may not work out in your favor. However, if you think Wu, Ver and friends are conspiring to do another weekend attack, go for it. Don't get left holding the bag..

If you're just in it for the money then fair enough try to make a profit trading BCH otherwise you're just contributing to the attack on Bitcoin.