Approximately 17,400 Bitcoin options contracts with a notional value of $1 billion are set to expire.The expiry is not expected to have a significant impact on spot markets, as they have been declining this week.The put/call ratio for the expiring contracts is 0.75, with more long (call) contracts than shorts (puts).In addition to Bitcoin options, around 119,000 Ethereum options with a notional value of $282 million are also expiring.