When a company's valuation is based on profits projected decades into the future, it reaches a critical point. Investors eventually stop buying into even more distant projections, causing a stall as they wait for reality to catch up or sell to others who still believe.

Some companies execute a 3-5 year plan and then revert to average returns. Others 'win by winning'—their success creates new opportunities and network effects, turning them into decade-long compounders that investors often sell too early.

During the dot-com crash, application-layer companies like Pets.com went to zero, while infrastructure providers like Intel and Cisco survived. The lesson for AI investors is to focus on the underlying "picks and shovels"—compute, chips, and data centers—rather than consumer-facing apps that may become obsolete.

History shows that transformative innovations like airlines, vaccines, and PCs, while beneficial to society, often fail to create sustained, concentrated shareholder value as they become commoditized. This suggests the massive valuations in AI may be misplaced, with the technology's benefits accruing more to users than investors in the long run.

For a proven, hyper-growth AI company, traditional business risks (market, operational, tech) are minimal. The sole risk for a late-stage investor is overpaying for several years of future growth that may decelerate faster than anticipated.

In a late-stage bubble, investor expectations are so high that even flawless financial results, like Nvidia's record-breaking revenue, fail to boost the stock price. This disconnect signals that market sentiment is saturated and fragile, responding more to narrative than fundamentals.

Financial models struggle to project sustained high growth rates (>30% YoY). Analysts naturally revert to the mean, causing them to undervalue companies that defy this and maintain high growth for years, creating an opportunity for investors who spot this persistence.

Swisher draws a direct parallel between NVIDIA and Cisco. While NVIDIA is profitable selling AI chips, its customers are not. She predicts major tech players will develop their own chips, eroding NVIDIA's unsustainable valuation, just as the market for routers consolidated and crashed Cisco's stock.

Callaway is selling Topgolf for $1B after paying $2.5B four years ago. This loss highlights that businesses booming due to unique pandemic conditions may not sustain that growth, creating significant risk for acquirers who buy at the peak.