I'm very careful not to tell anyone to buy anything, but I don't think it's a bad strategy to keep what you got from the fork if you held BTC previous to it.

Personally I can't say exactly how this will play out obviously, but so far I see no reason that Bitcoin Cash is just a pump and dump that's going to implode as some thousands of spam bots have repeated for months now.

Probably the future has a place for both networks and I wouldn't be surprised to see one acting as a more experimental alternative to the other. For sake of not getting into time consuming arguments, I won't say which one =)