Ethereum has broken through $4400, with significant increases in implied volatility and Skew compared to last week, and market expectations for a significant rise. In terms of bulk transactions, today's bulk call options sold for 330 million US dollars, accounting for 24% of the total transactions, mainly consisting of medium and long-term call options. Large investors are more optimistic about the sustainability of Ethereum's rise. Bitcoin mainly relies on buying protective put options, and the market is beginning to differentiate. Currently, the main trading heat is concentrated on Ethereum. Option trading advice: Short term buy ETH call and BTC put, cross currency and cross style operations