Playing cards in a dream often symbolize fate. If you dream that you are playing in a card game, you could feel that you are trying to control a situation over which you, ultimately, have little control.
A dream that you are playing cards can mean that you are thinking about taking a risk.
Playing cards have been used in fortune telling for a long time, and the four suits have come to have special meanings:
Hearts: The emotions
Diamonds: Wealth and things of value
Clubs: Action and hard work
Spades: Conflict and obstacles.
In addition, the King represents dominance and success, the Queen represents emotional sensitivity, and the Jack represents energy and creativity