after the Fed announced a slowdown in tapering, Bitcoin rebounded by more than 5% from below $83,000, briefly surpassing $87,000. QCP Capital analysts pointed out that trader sentiment is turning bullish as bullish options become more expensive, or there is a higher demand for bullish options compared to bearish options, contrasting with the situation earlier this week. However, Greg Magadini, Derivatives Director at Amberdata, believes that macro uncertainty still exists and option skew may once again shift towards bearish. (Note: The so-called "skew" refers to the difference in volatility between put and call options in the options market).