The U.S. marijuana industry is booming. Medical marijuana is now legal in 23 states and the District of Columbia. Recreational use is legalized in four states, with others eyeing legislation. Research firm GreenWave Advisors estimates the U.S. market could be worth $35 billion by 2020 if it is legalized federally.
But that industry growth has come with a dangerous trend: Pot stocks are scamming investors by trying to pass themselves off as the next hot marijuana startup.