Berkshire Hathaway made several interesting moves in its portfolio during the first quarter. But how the Oracle of Omaha is steadily growing his cash pile may intrigue you.Over the last several weeks, companies have been reporting earnings for the first quarter of 2024. Considering both the S&P 500 and Nasdaq Composite are notching record highs, investors have been keen to assess the progress of the hottest themes in the market. Artificial intelligence (AI), new breakthrough medications in the pharmaceutica ...