Quantum computing stocks sank on Wednesday, pausing a year-long rally, after Nvidia CEO Jensen Huang said the technology's practical use was likely two decades away. The long wait outlined by Huang for "very useful quantum computers" throws cold water on a sector that was already expected to spend millions more on the technology,

Quantum computing stocks dropped Wednesday after Nvidia CEO Jensen Huang declared that useful quantum computers are likely decades in the future.

A highly advanced type of computing based upon the principles of quantum mechanics, quantum computing could spark the next tech sector gold rush for investors in 2025. Related: Ve