Vision: Seeing a briefcase means that someone has enough trust to share a secret with you. Losing your briefcase: all your secrets are being unveiled. Finding a briefcase with money inside: you would like to have money without working for it. Somebody stealing your briefcase: a warning to watch out for false friends. See Purse.
Depth Psychology: A briefcase is a symbol of your professional/business life. ... Dreamers Dictionary
To see or carry a briefcase in your dream, represents your level of preparedness in some situation or circumstance. It also refers to your concerns and worries about work and travel.... My Dream Interpretation