Odaily News Nick Forster, founder of decentralized options protocol Derive, said that the so-called bullish-bearish skewness index of Bitcoin expiring on December 27 has dropped sharply by 30% in the past 24 hours as market participants turn to more protective strategies. The bullish-bearish skewness reflects market sentiment and refers to the difference in implied volatility between call options and put options. Despite the decline, the index still shows that there are more call options than put options in the market. According to Forster, by December 27, there is a 68% probability that Bitcoin will fall 16.03% to $81,493 or rise 19.9% to $115,579. However, the probability of a larger fluctuation in Bitcoin (a drop of 29.49% to $68,429 or a rise of 41.83% to $137,645) is smaller, at about 5%. Derive's data also shows that the probability of Bitcoin reaching $100,000 has risen to 45% from 34% last week, and the probability of exceeding $150,000 is 4%. (reuters)