According to Bloomberg, options market data shows that as Bitcoin approaches $80,000, call options at that strike price on Deribit are heavily accumulated, forming a significant open interest; market makers need to sell Bitcoin as the price rises to hedge, and the related long gamma mechanism constrains the upward movement at that level. Currently, approximately $1.5 billion in notional value of call options are concentrated with expiration dates in May and June, with about $160 million and $566 million expiring on May 1 and May 29, respectively; at the same time, a weak futures market, slowing spot demand, and some profit-taking behaviors have also caused Bitcoin to repeatedly face resistance around $80,000.