Cramer's Lightning Round: Plug Power gets unplugged

Jim Cramer, host of CNBC's "Mad Money," expressed his lack of confidence in Plug Power due to its consistent failure to meet quarterly expectations. However, he showed optimism towards Super Micro Computer, a company involved in supercomputing and a derivative of Nvidia. Cramer also praised InterDigital as a premier digital wireless company with undervalued stock prices. Regarding Marathon Digital, he advised caution, suggesting that investors who want exposure to Bitcoin should directly own the cryptocurrency. Lastly, Cramer mentioned MP Materials without providing specific commentary.