Risks of Investing in Quantum Computing

The Honest Truth

Quantum computing is one of the most exciting technology trends of our lifetime. But excitement is not the same as a good investment. The reality is that quantum computing stocks carry significant risks, and investors need to understand them clearly before committing capital.

Risk 1: The Technology Is Still Early

We're in the NISQ era (Noisy Intermediate-Scale Quantum). Current quantum computers have hundreds of physical qubits, but they're too noisy and too error-prone to solve real-world problems faster than classical computers. Fault-tolerant quantum computing — the threshold at which quantum becomes commercially useful — is widely expected between 2028 and 2035, but it could take longer.

This means companies investing in quantum today are spending heavily on R&D with no guarantee of commercial returns for years, possibly a decade. Investors need to be prepared to hold for a very long time.

Risk 2: Revenue Is Tiny

The pure-play quantum companies generate remarkably little revenue:

• IonQ — annual revenue under $50 million, with net losses exceeding revenue
• Rigetti — annual revenue under $20 million, similar losses
• D-Wave — annual revenue under $30 million, still unprofitable

These are micro-cap-level revenues supporting hundreds of millions in market capitalisation — sometimes billions during hype peaks. The valuation is entirely based on future potential, not current performance. If the expected commercial breakthroughs don't arrive on schedule, these valuations can collapse quickly.

Risk 3: Stock Dilution

Because quantum companies are unprofitable, they need to raise capital continually. They do this primarily by issuing new shares, which dilutes existing shareholders. Every new share issue reduces your ownership percentage and can push the share price down.

This is a particular problem with pure-play quantum stocks, which have high cash burn rates and no profits to fund operations. Before investing in any quantum company, check:

• The cash runway — how many months until they run out of money?
• The dilution history — how much has share count grown over the past 3 years?
• The shelf registration — have they filed to sell more shares in the near future?

Risk 4: Hype Cycles

Quantum computing stocks are prone to extreme hype cycles. A positive news story — a new qubit count announcement, a government contract, a celebrity investor — can send shares soaring 50% or more in days. Then the reality sets in and they crash back.

This volatility can be psychologically brutal. Investors who buy at the peak of a hype cycle can be underwater for months or years. If you're investing in quantum, you need to be prepared for significant drawdowns — 50-80% declines are not uncommon for pure-play quantum stocks.

Risk 5: The Big Tech Problem

The pure-play quantum companies aren't just competing with each other — they're competing with IBM, Google and Microsoft, all of which have vastly more resources. These tech giants can pour billions into quantum R&D without it materially affecting their financials. A pure-play company spending $100 million per year on quantum research is competing with companies spending $1 billion+.

There's a real possibility that the eventual winners in quantum computing are the big tech companies, not the pure-plays. In that scenario, pure-play investors could lose everything even if quantum computing succeeds.

Risk 6: Technological Dead Ends

Different companies are pursuing different qubit technologies — superconducting, trapped-ion, photonic, topological, annealing. We don't yet know which approach will prove most scalable. If you invest in a company using a technology that turns out to be a dead end, your investment could become worthless even if quantum computing as a field succeeds.

This is another argument for ETF investing (like QTUM) or spreading bets across multiple companies using different technologies.

Risk 7: Regulatory and Geopolitical Risk

Quantum computing has significant national security implications — particularly around cryptography. Governments are increasingly treating quantum technology as strategically critical, which could lead to:

• Export controls restricting which companies can sell quantum technology to which countries
• Investment restrictions — foreign investors may face limits on holding stakes in quantum companies
• Government-funded competition — state-backed quantum programmes (particularly in China) could undercut commercial pricing

The UK's National Quantum Strategy and the US CHIPS Act both include quantum provisions, and the regulatory landscape is still evolving.

Risk 8: The AI Distraction

The current tech investment narrative is dominated by AI. While AI and quantum computing are complementary technologies, investor attention (and capital) is finite. If AI continues to absorb the lion's share of tech investment, quantum companies may struggle to attract capital, delaying their roadmaps and increasing dilution risk.

How to Manage These Risks

• Position size appropriately — quantum should be a small part of a diversified portfolio (1-5% maximum for most investors)
• Prefer big tech over pure-plays — IBM, Microsoft and Alphabet offer quantum exposure with actual businesses underneath
• Use ETFs — QTUM spreads risk across the whole sector
• Dollar-cost average — invest regularly over time rather than all at once, to reduce timing risk
• Have a long time horizon — 5-10 years minimum. If you can't wait that long, quantum isn't for you
• Use your ISA — tax-free gains are especially valuable when volatility is high

The Bottom Line

Quantum computing is a genuine technological revolution — but that doesn't make it a guaranteed investment success. The risks are real: early-stage technology, tiny revenues, dilution, hype cycles and the possibility that big tech wins. Invest only what you can afford to lose, diversify, and think in years, not months.

Next Steps

• Is Quantum Computing a Good Investment in 2026? — the investment case
• IonQ vs Rigetti vs D-Wave — comparing the pure-plays
• Quantum Computing ETFs — diversified exposure

Nothing on this site is financial advice. All content is educational. Always do your own research and consult a qualified financial adviser before making investment decisions. Back to all guides.