McDonald says looking at cannabis companies now is "like looking at Apple (AAPL) or Microsoft (MSFT) stock in 1985" in terms of growth potential and returns for investors. Marijuana companies only have been public for a couple years.
"There won't be a joint in every home like there is a computer in every home, but we're looking at a potential $40-$50 billion market cap from zero. I think the returns here (for investors) will be as strong as they were in the first three years of the PC."
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