If you are normally a passive person, the dream may be a sign that you should take a chance in your life.
If you already live on the edge, the dream may suggest that you should make more careful decisions instead of relying on chance. What you are doing in your dream casino can indicate how you are playing the game of life. Are you playing recklessly and with no thought of the morrow, are you playing by the rules or are you seeking to exploit loopholes in the rules? All this can be seen as a comment on real-life situations, such as starting a business or new job.
See also Gambling entry in LEISURE.