Laundering money is read as an attempt to make something look cleaner than it is. Dream tradition links it to guilt kept out of sight, or to a story you keep polishing so no one asks where it began.
Has this come up in your dreams before? What was going on in your life then?
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.