A money bag is read as gathered resources, often in the cartoon sense of a heavy sack of gain. Dream books link it to ambition, greed or the wish to have more than enough.
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.