Thank you for sharing your dream with us. Please take everything that I share to the Holy Spirit as He Alone gives the accurate interpretation.
Ask the Lord to give you insight regarding what the “keys” represent. It sounds like you do have the keys that might provide literal/metaphorical wealth in incremental amounts. You may have to wait for the “wealth” that has been stored up for you. In addition, ask the Lord for wisdom to be able to discern how to use the “keys” provided for you and if there is something literal that has been hidden from you in the natural.