Quantum stocks like Rigetti plunge after Nvidia's Huang says the computers are 15-to-30 years away

Nvidia CEO Jensen Huang speaks with the press during the launch of the supercomputer Gefion at Vilhelm Lauritzen Terminal in Kastrup, Denmark, on Oct. 23, 2024.Quantum computing stocks dropped Wednesday after Nvidia CEO Jensen Huang declared that useful quantum computers are many years away."If you said 15 years for very useful quantum computers, that would probably be on the early side," he said during Nvidia's analyst day. "If you said 30, it's probably on the late side. But if you picked 20, I think a wh ...