For years now USA has been throwing money at problems like budget gaps in rich states (like California or New York) or a drug war that’s gotten out of hand.
Not only that, but by failing to decriminalize cannabis states like California lose about a billion so much needed cash, which instead goes to drug gangs.
Although Prop 19 failed to pass now, it’s most probably just a matter of time. As we see time and again that Prohibition-like laws just DON’T WORK.

Currently, most of the public Medical Marijuana companies are pinkies:

MEDICAL Marijuana (Public, PINK:MJNA)
Cannabis Medical Solutions, Inc. (OTC:CMSI)
Cannabis Science, Inc. (OTC:CBIS)
GreenGro Technologies, Inc. (PINK:GRNH)
GW Pharmaceuticals Plc. (PINK:GWPRF)
Marijuana, Inc. (formerly Preachers Coffee Inc) (PINK:PCIO)
Pharmos Corp. (PINK:PARS)
Health Sciences Group, Inc. (PINK:HESG)
Rapid Fire Marketing, Inc. (PINK:RFMK)
Smokefree Innotec, Inc. (PINK:SFIO)
Amergence Group, Inc.(AMNG)

… some of which not in a great shape, so investing in the field appears quite risky. But if any of these manages to remain afloat until next elections,
it will become pure gold.