Newsflash: When marijuana is legalized, Americans will buy marijuana legally.Canopy Growth (CGC 1.89%) stock inched 3.2% higher through 10:35 a.m. ET Monday after marijuana news source Marijuana Moment reported on a new positive development for the (legalized) marijuana industry:According to cannabis telehealth platform NuggMD, most Americans now prefer to buy their weed from legal sources. The legal marijuana marketThere are caveats to this conclusion. As Marijuana Moment describes, NuggMD's survey focused ...