According to coinbase

Resolution criteria

• Resolve YES if, at any moment from 2025-09-01 00:00:00 UTC through 2025-09-30 23:59:59 UTC, the BTC-USD pair on Coinbase prints a trade at or above $118,000. Otherwise NO. Verify using Coinbase’s BTC price page; use the intraday high shown on the chart/candles for BTC-USD. (coinbase.com)

• “High” means the highest traded price on Coinbase during the selected interval; candlesticks display O/H/L/C and are acceptable for verification. (help.coinbase.com)

• Edge cases: Only Coinbase’s BTC-USD market counts (not ETFs, indexes, or other exchanges/pairs). UTC time governs month boundaries. If Coinbase later flags/trades are canceled, resolve using the price history as displayed 48 hours after September ends on the Coinbase page. (coinbase.com)

Background

• Coinbase currently lists Bitcoin’s all‑time high as ~$124,290 reached on August 14, 2025. As of early September 2025, BTC is trading near ~$110–113K on Coinbase. (coinbase.com)

Considerations

• Exchange-specific highs differ; this market is Coinbase-only by design. (coinbase.com)

• Thin-liquidity “wicks” count if printed on Coinbase within the September 2025 UTC window. (help.coinbase.com)

• Coinbase’s consumer price page is acceptable for verification; if unavailable, any Coinbase Advanced chart of BTC-USD showing September 2025 highs is acceptable. (coinbase.com, help.coinbase.com)