Jim Cramer's take on the meme stock mania of 2021 drew the ire of a powerful group that was swaying markets during the pandemic: retail traders. In January 2021, Cramer called into CNBC from the hospital and urged GameStop investors to sell. Cramer told retail investors to sell GameStop when he called into CNBC from the hospital. GameStop stock has been on a rollercoaster ever since its short-squeeze in 2021, but it retains a dedicated following among some retail investors, who periodically reignite fresh meme-like rallies. GameStop shares traded around $27 on Monday.