A dream about affluence can often mean that you feel impoverished in waking life.
You may not lack material things, but you could be lacking emotional support, security, understanding, kindness or spiritual comfort.
If you dream that you are affluent, your unconscious may be telling you that you have worked hard for something and you deserve to be rewarded. Perhaps you feel that others are getting the credit that you deserve.
A dream that you were affluent but have lost all your wealth can be a warning that you are engaging in risky behavior.