Is a coin with cc marked on it worth money?

ALL genuine coins are worth something, whether it be simply their face value, their metal value, or their value to a collector. Coins from Carson City tend to have fairly high collector values because that mint made only silver and gold coins and made fewer of them than most other mints.

In any case without knowing the coin's date, denomination, and how worn it is, it's not possible to say anything more. Please post a new and more specific question if you're interested in an evaluation.