Bitcoin options traders target $75K as 27 March expiry captures over 40% open interest

Bitcoin is trading near $73,600 as quarterly options expiring on 27 March now represent over 40% of total open interest, with a large cluster of call positions at the $75,000 strike. This concentration, described as a "gamma wall", is raising expectations that market makers' hedging could fuel sharp volatility if BTC either breaks above or fails at this key resistance zone.