Quantum Computing Bubble? Why These Hot Stocks Might Be in for a Crash

Quantum computing went from niche tech to mainstream investment obsession. IonQ, Rigetti, and D-Wave? Up 89%, 1,500%, and 1,800% in a year. Sounds great. But here’s the catch — the hype might be running way ahead of reality.

Problem #1: These Machines Still Suck at Math

Quantum computers are amazing in theory. In practice? They error out constantly. The tech is still so error-prone that researchers like Nvidia’s Jensen Huang are essentially saying “yeah, we need to keep quantum computers paired with regular supercomputers to make them useful.”

Even Google, which just released their Willow quantum processor, isn’t pretending it’s ready for real work yet. CEO Sundar Pichai basically said: we’re making progress, but it’s “not quite there yet.”

Translation: We’re probably years away from quantum computing actually solving real problems.

Problem #2: The Valuations Are Absolutely Unhinged

Here’s where it gets scary for anyone holding these stocks:

For context, tech stocks typically trade at a 9x price-to-sales ratio. These companies are at 150-1000x. They’re burning cash like there’s no tomorrow while barely generating revenue.

The market’s patience with unprofitable companies wore thin with the AI bubble. Quantum stocks are playing the same game but with even thinner margins (literally).

The Real Talk

Quantum computing will probably be huge eventually. The BCG estimates suggest an $850 billion market by 2040. But “eventually” is doing a lot of heavy lifting here.

Investors are pricing in that future today while these companies are still in sandbox mode. If any of these firms stumble on the path to profitability — or if the error rate problem takes longer to solve than expected — the correction could be brutal.

This looks a lot like betting on the horse before it’s even learned to walk.