To dream that you steal something such as money or any other valuable items, means that you wish to have things you dont have. You think that material things will make you happy, therefore you wish to have it no matter what. If somebody stole something from you that belonged to you, then such dream signifies your frustration. You feel unappreciated and unevaluated. Sometimes when the dreamer takes something from someone in the dream that doesnt belong to him, feels that this certain person or life overall owes something to him.
Read more about dreaming of Taking (stealing) in other dream meanings interpretations.