Quantum computing is hot right now. Shares of pure play quantum computing stocks have been soaring, and the hype train has clearly left the station. Investors should know, however, that quantum computers have never been used to solve a real-world problem faster than a traditional computer and that useful quantum computers could very well be decades away.

Trapped-ion quantum computing leader IonQ (NYSE: IONQ) is emerging as a potential leader in the commercialization of quantum computing through its trapped-ion technology approach. Unlike traditional superconducting quantum competitors,

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.

Alphabet recently made breakthroughs with its Willow chip that caused shares of quantum computing stocks Rigetti and D-Wave to soar. Many industry experts estimate useful quantum computing is one or two decades away,