“Over time, the low cost providers that have disruptive scale will own this market and margins will be no better than the tobacco industry,” he said. “So somewhere along the line there’s going to be a pretty brutal correction – I don’t know when or how that’s going to happen.”

He added he’s also not interested in investing in a controversial product that Mothers Against Drunk Driving doesn’t want to see in the hands of teenagers.

“I have no interest in that,” he said.

Watch the full Kevin O’Leary segment on cannabis here:

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