Investor anxiety about an AI bubble is at "fever pitch" with fears growing that a surge in artificial intelligence investment could lead to a crash similar to 2000's dot-com bust.

Artificial intelligence has seen huge investment: 50% of venture dollars were spent on AI start-ups during the first half of 2025, according to data from CB Insights. And in those six months "AI funding exceeded spending for all of last year", said Business Insider .

Yet investors have a number of concerns. "Some are wondering whether large language models are actually powerful enough to develop the long-desired superintelligence; some fear tech companies' massive expenditures won't pay off; and some are worried that less experienced investors are getting caught up in the hype."

Why is there so much concern

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