With a domain like cheatbj.com, I would think of content related to the keywords in the domain. How to cheat at blackjack would be an obvious topic. How to do so well at blackjack that it seems like you’re cheating would be another. And of course, “cheat” and “bj” both have connotations having nothing to do with online gaming that could be very profitable too.
You could also try to sell the domain at a profit, although the price of a domain will go up considerably if there’s an actualy live website there.