Quantum Computing Inc (NASDAQ: QUBT) is down some 15% in premarket on Monday, erasing part of the gains that materialised last week as investors cheered the company’s announcement of a $500 million private placement.

However, the hype is fading and reality is setting in again today as markets realise that, despite the cash infusion, QUBT’s underlying fundamentals remain deeply concerning in 2025.

Therefore, Quantum Computing’s share price decline this morning isn’t a “buy the dip” opportunity.

In fact, here are the top three reasons why investors should consider selling the rip in QUBT stock at current levels.

Dilution could hurt Quantum Computing stock

Quantum Computing’s recent announcement of a $500 million private placement may have padded its cash reserves to about $850 million – but it came at the cost of significant dilution risk.

The firm’s market cap ballooned on speculative momentum, yet the influx of new shares threatens to erode existing shareholder value.

Without a clear roadmap for deploying this new capital into revenue-generating initiatives, the raise looks more like a lifeline than a growth catalyst.

Therefore, investors should be wary of the potential long-term impact on earnings per share (EPS), voting power, and the QUBT stock price performance.

In a market increasingly sensitive to dilution and capital efficiency, Quantum Computing Inc’s fundraising strategy could backfire – especially if future rounds follow without meaningful progress.

QUBT shares lack a permanent chief executive

Despite its lofty ambitions in quantum cybersecurity, QUBT remains a company with little to show.

Commercial traction is virtually nonexistent, with just $61,000 in sales and a modest $406,000 NASA contract.

Meanwhile, executive turnover continues to plague the firm, which still lacks a permanent chief executive.

Leadership instability raises serious questions about strategic direction, execution capability, and investor confidence.

In a sector where credibility and partnerships are key, the absence of operational milestones and a clear governance structure is a glaring red flag for those interested in buying Quantum Computing stock.

Until the Hoboken-headquartered firm demonstrates real progress, QUBT shares’ rally looks more like a mirage than momentum.

Quantum Computing shares’ valuation defies gravity

What’s also worth mentioning is that Quantum Computing stock remains egregiously overvalued, even after a 15% decline on Monday.

The speculative rally has pushed its valuation far beyond what its fundamentals justify.

Analyst revenue estimates for 2026 have actually declined, underscoring the disconnect between market enthusiasm and realistic growth expectations.

With no meaningful earnings, limited contracts, and fierce competition in quantum tech, QUBT stock trades more like a meme than a serious investment.

For long-term investors, the risk-reward profile is skewed heavily toward downside.

Unless the Nasdaq-listed firm delivers a breakthrough or secures major partnerships, its current valuation is unsustainable.

Selling the rip now could save investors from a much steeper fall ahead in this quantum computing stock.

The post Quantum Computing stock tumbles 15%: buy the dip or sell the rip? appeared first on Invezz