There will still be a huge medical market. Anyone that can get a prescription will make use of it, as it's not taxed as heavily as recreational, which translates to cheaper weed and, because the government isn't dictating breeding and growing procedures, a wider variety of strains of varied strengths and genealogies, which the recreational market will never get, at least in WA.
If it were me, I'd rather have the medical license. Oh, look, investor... I guess it *is* me. :)
JMHO