CNBC host Jim Cramer has issued a warning about the current level of speculation in the cryptocurrency market, likening it to the 2000 bubble. On October 22, Cramer expressed concerns on social media, noting that while JPMorgan CEO Jamie Dimon suggested an end to speculation, the bank's announcement of a $150 billion fund has fueled a speculative surge. Cramer advised caution, urging investors to reduce their positions to prevent potential harm to the public.