Billionaire investor Orlando Bravo has issued a warning about a potential bubble in the artificial intelligence sector, pointing to high valuations and limited growth justification. Nvidia, a key player in the AI boom, has seen its stock price approach an all-time high, benefiting from the sector's rapid expansion. Bravo expressed concerns over circular investments and the industry's heavy reliance on a few dominant companies, such as OpenAI and Microsoft. Despite technical analysis indicating a possible rebound for Nvidia's stock, a decline below $175 could indicate a bearish trend, according to market analysts.