Crypto markets face $5.3 billion options expiry. | Credit: Photo by Spencer Platt/Getty Images. Key Takeaways$4.3 billion worth of Bitcoin options exhibit a 1.12 put/call ratio, signaling expectations of a price decline. Call options are bets that the price will go up (bullish); put options are bets that the price will go down (bearish). Historical trends indicate short-term market drops post-expiry, but Uptober could soften the bearish lean. A massive $5.3 billion in Bitcoin (BTC) and Ethereum ( ...