Approximately 28,000 Bitcoin options contracts with a notional value of $2 billion are expiring today.The impact on spot markets is expected to be limited, as this week's options expiry is smaller compared to last week's.The put/call ratio for today's Bitcoin options batch is 0.92, indicating a more balanced distribution of long and short contracts.The crypto market has experienced a 5.5% slump in the last 24 hours, with Bitcoin briefly dropping below $69,000.