Nvidia CEO Jensen Huang's sobering assessment of quantum computing's timeline sent the space into a tailspin last week. During a question-and-answer session with analysts, Huang suggested that useful quantum computers were likely 15 to 30 years away.

Quantum computing is taking off, but how long will it take, and which stocks should you consider? Two leaders in the space stand out as great investments today.

All it took to derail a rally that had sent shares of pure-play quantum computing stocks soaring was a single comment from a tech CEO. When Nvidia's Jensen Huang suggested that a useful quantum computer was likely decades away,

Jensen Huang’s comments at last week’s CES about quantum computing being decades away stirred up discussion within the quantum industry.