I don't know about therapeutic, I suppose it depends on how you feel abou. The dreams, whether they are good or bad.

I know my dreams help me monitor my mood. I have a specific recurring dream in which something gets me very angry and I freak out, generally causing serious harm to property and usually another person. These are the fantasies I have when I am unwell, so when I have these "screaming dreams" I try to think about my mood and whether I'm heading in a dangerous direction.