Both Bitcoin (BTC) and Ethereum (ETH) experienced sharp declines of approximately 4% in a 30-minute candle, as shown in the charts. This occurred shortly after widespread euphoria on Crypto Twitter (CT) predicted ETH would reach $5,000 by the end of the day, suggesting a contrarian indicator in market sentiment. Investors should be cautious of over-optimistic market sentiment, as it can precede rapid price corrections.