The provided evidence overwhelmingly confirms the statement. Multiple credible sources (CNBC, The Guardian, BBC, Al Jazeera, IMF) report that Elon Musk publicly expressed major concerns about Bitcoin's energy consumption, suspended Tesla's acceptance of it for this reason, and conditioned its future acceptance on miners using a significant percentage of clean energy. His comments, describing the energy use as 'insane' and a reason for environmental concern, directly highlighted this fundamental aspect of Bitcoin's operation.