Resolves Yes if BTC-USD on Coinbase prints strictly below $107,500 at any time in October 2025 (PT: Oct 1, 12:00 AM → Oct 31, 11:59 PM). Any Coinbase tick/trade below $107,500 counts—including wicks or momentary lows visible in Coinbase’s trade history. Otherwise resolves No. Source: Coinbase official historical trade data.