Quantum computing shows promise in revolutionizing financial risk analysis, drug discovery, and artificial intelligence, but widespread adoption is at least a decade away. The projected quantum computing market is $4.2 billion in 2030, much smaller than the artificial intelligence market 425 times over.

Stocks of Rigetti Computing, D-Wave Quantum, and IonQ have surged over 1,000% in the last three years but now trade at bubble-like valuations. Despite the hype, quantum computing remains a microscopic market with unsustainable valuations.

General-purpose quantum computers are still a decade or two from being useful to most enterprises due to the need for tens of thousands to millions of physical qubits. Rigetti, D-Wave, and IonQ specialize in different types of quantum computing technologies, with varying numbers of qubits in their systems.

Rigetti trades at 928 times sales, D-Wave at 362 times sales, and IonQ at 150 times sales, with projected revenue growth. Comparatively, Nvidia in 2015 was significantly cheaper. The quantum computing stocks are vastly more expensive than the top S&P 500 stocks, indicating a potential bubble.

Considering the high valuations and the distant practical utility of quantum computing, investing in Rigetti, D-Wave, or IonQ carries significant risk. The bubble-like valuations are unsustainable, with a potential crash looming in the future. The hype around quantum computing may not align with market realities for some time.

Read more at Nasdaq: Prediction: 3 Popular Stocks Will Crash in 2026 When This Stock Market Bubble Bursts (Hint: Not Artificial Intelligence)