According to Warren Buffett, as cited in his annual shareholder letters, everyone has the brainpower to make money in stocks by applying simple and disciplined strategies. This KISS (Keep It Simple, Stupid) approach emphasizes avoiding complex trading systems and focusing on clear, proven methods, which increases consistency and reduces emotional errors in trading (Warren Buffett, Berkshire Hathaway Shareholder Letter). For cryptocurrency traders, applying the KISS principle can help minimize losses from high volatility and improve risk management in assets like BTC and ETH.