Quantum computing stocks were red-hot recently, but Jensen Huang just offered optimistic investors a reality check.

Don't believe the hype? GPU maker jumps on the bandwagon anyway A week after Nvidia chief Jensen Huang demolished the market valuations of listed quantum computing brands by saying the technology is 20 years away from being useful,

The stocks were slammed last week, when Nvidia’s CEO said it would take decades for the technology to become “very useful.”

Quantum Computing didn't have any news of its own to report, but the company is even smaller than D-Wave, with less than $1 million in revenue over the last four quarters. Its stock has soared even higher than D-Wave's over the last year, a disconnect that could lead to a continued decline in Quantum Computing's shares.