Some types of dreams can help people figure out solutions for the waking hours within the limits that they must work within. Representing what we could or cannot often comes in the form of dreams about using crutches or seeing crutches laying around. People who believe they depend on their crutches might not even realize that their dreams have been transformed into analogies for possible solutions or new things in waking life but just pick up on those aspects unconsciously without thinking about it.
Dreaming about your crutches also represents that you are working on your weakness in order to keep up with someone else or something. Some people imagine themselves as working on their non-dominant arm to dribble the basketball better.