BlockBeats News, December 21st, according to Alternative Data, today's cryptocurrency Fear and Greed Index is at 20 (same as yesterday), indicating that the market is still in a state of "extreme fear."Note: The Fear Index threshold is 0-100 and includes the following indicators: Volatility (25%) + Market Volume (25%) + Social Media Hype (15%) + Market Surveys (15%) + Bitcoin Dominance (10%) + Google Trends Analysis (10%).