```

according to Alternative data, today's cryptocurrency fear and greed index is 13 (yesterday was 11), with a weekly average of 10, indicating the market sentiment is in a state of extreme fear.

Note: The fear index threshold is 0-100, including indicators: volatility (25%) + market trading volume (25%) + social media popularity (15%) + market surveys (15%) + Bitcoin's proportion in the entire market (10%) + Google search trend analysis (10%).

```