If you dream that you put something in the vault, then such dream indicates your fear and apprehension of being used by other people. You feel insecure, therefore you think you must hide not only yourself, but things that belong to you. The dream suggests to be less paranoid and start trusting people. If you took something out of vault, it means that you are relaxed person who is capable of taking care not only of himself/herself, but others too. If you are trying to get into vault in which you shouldnt, because it doesnt belong to you, you should stay away from other peoples business. If you are unable to get into vault in order to take whatever belongs to you, then such dream indicates the necessity to work harder and take what is supposed to be yours.
Read more about dreaming of Vault in other dream meanings interpretations.