The meaning of dreaming that you are in a casino is related to the person of yourself who likes to take risks. If you are a reserved or passive person, then the dream's interpretation is that you should listen to your intuition and to seize the opportunity, the chance. If you're not a reserved person, the interpretation is that you need to make a decision based on more information, than one based on chance.
You may look in dreams interpretation for other symbols :
Castle : Seeing a castle in your dream means reward, honor, recognition and praise for your accomplishments. You are destined for a position of power, wealth and prestige. ... ml">">
Castration : The meaning of dreaming about castration is related to your overwhelming fear that you've lost your virility. You feel the pressure of your sexual performance. ...