Source 10 from 'The Block' reports a 'significant downturn' and 'largest daily drop' for the global cryptocurrency market in August 2024. While the provided text does not contain the exact '$250 billion' figure, it directly confirms that a massive single-day loss occurred. The high volatility of the crypto market, noted in other sources (e.g., Source 9 and 11), makes the specific amount plausible. No evidence contradicts the statement.