Kevin O'Leary, the judge of the popular business reality show Shark Tank, has slammed Anthony Pompliano for allocating half of his wealth to bitcoin.

"Shame on you," the television personality told Pompliano on the sidelines of a CNBC Squawk Box debate about bitcoin's performance against gloomy macroeconomic periods. O'Leary stated that he purchased $100 worth of bitcoins about two months ago, but the value of those assets now dropped to about $30. And if a person does not assume the risks of holding bitcoins and concentrates half of his wealth on them, then he is "nuts."

"I forbid that," O'Leary told Pompliano. "That's insane. That breaches everything about diversification and investing."