A beanie is read as warmth, comfort and keeping your thoughts snug. Tradition links it to a relaxed, low-key self that prefers ease over show.
When this appeared in your dream, what were you feeling?
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.