Key facts: CRYPTO:BTCUSD call-skew; $4B buffer; $61K–$67K OI; delay
BTCUSD open interest: about $15B in calls vs $10B in puts after expiry; main strikes concentrated $61K–$67K. Traders bought $65K calls and sold puts; positioning shows short-term call bias.Strategy sold 3,588 BTC of spot BTCUSD at an average $60,197, shifting from accumulation to selling and buildin