The price of Bitcoin was relatively strong last week, once it exceeded $50,000. At the same time, however,option investors are buying put options to seek price protection. The option skewness indicator once fell to a negative value, the call option premium disappeared. The market showed rationality for Bitcoin's short-term price performance. The price of Ethereum stabilized in the range of US$1,700-1,800 last week, and the implied volatility of options gradually declined.
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