Marbles are traditionally read as childhood treasures and small stakes won and lost. The old saying about losing one’s marbles also ties them to fear of losing composure.
Does the traditional reading fit your dream, or did it mean something else to you?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.