My opinion is that with BTCP you are doing speculative mining since BTCP is still considered fairly new and undervalued. They aren't even listed on any of the big exchanges yet. There is room to grow definitely, and when that happens all the miners would surely be rewarded. The question now i guess is IF and WHEN.
This is a good summary of the situation with BTCP currently. The block reward is not large, and if you decide to mine, it makes sense only if you want to keep the coins and hope for a future rise. BTCP definitely has a potential, its privacy features are promising and it has a decent team and community. But BTCP is not a coin I would choose if I wanted to make profit short term.