Briefcase ,To dream of a briefcase represents experienced preparedness. You or someone else that has a lot of experience in some area. An informed or organized readiness. You have the skills, knowledge, or resources on hand to do something whenever you want.
Example: A woman dreamed of seeing a briefcase opened in front of her. In real life she was considering starting a business that was easy for her to do and required no capital to start. The briefcase reflected her readiness to invest in the business since she already had the necessary skills and resources to do so.