Warren Buffett, known for saying 'Cash is a bad investment,' currently holds a record $334 billion in cash through Berkshire Hathaway. Although he typically advocates investing in great businesses rather than keeping cash, he finds current investment opportunities too scarce, overpriced, or unavailable. Buffett is strategically waiting for better investment chances, following his principle of being greedy when others are fearful. His significant cash reserve shows discipline in a market he views as overvalued.