Group 1 - IREN Limited (NASDAQ:IREN) is involved in data centers, electrical infrastructure, computing hardware management, and Bitcoin mining [2] - The stock has experienced a significant rally of 380%, leading to concerns about its valuation being "too hot" [2] - Jim Cramer has advised selling IREN, indicating a potential decline in insider selling within the sector [1][2] Group 2 - The company is exploring a pivot to AI data centers, similar to strategies employed by other firms like CoreWeave [2] - While IREN is currently profitable, there are suggestions that other AI stocks may present better investment opportunities with higher upside potential and lower downside risk [2]