A cohort of Wall Street's most influential billionaire investors has significantly increased their holdings in Nvidia Corp. (NASDAQ:NVDA), signaling strong confidence in the AI chipmaker's future. The aggressive buying spree coincides with a bold prediction from a prominent tech analyst who sees the company's market capitalization soaring to $5 trillion.Check out NVDA’s stock price here.Billionaires Load Up On Nvidia StockAccording to the second quarter 13F filings, some of the biggest names in hedge funds ...