According to @CNBC, the CEOs of HSBC and General Atlantic warned that AI capital expenditures are running ahead of current revenue and described parts of the AI market as exhibiting 'irrational exuberance' (Source: CNBC). CNBC reports the remarks as management-level caution on ROI and capital efficiency within the AI investment cycle, a signal closely watched by equity market participants focused on AI-linked valuations (Source: CNBC). CNBC notes the discussion centers on AI spending dynamics and does not reference cryptocurrencies (Source: CNBC).