Bitcoin’s October Returns: 10 Gains, 3 Losses Since 2013, Average 18.52%

Seasonal framing is doing more work here than the sample can support: thirteen Octobers is a small, heavily overlapping set drawn from Bitcoin's early, structurally different market eras, and the 2013 outlier alone lifts the average well above the median. The more interesting detail is the September figure, which places the current year near the top of a much shorter record — a reminder that base effects and shifting market structure, not calendar patterns, tend to drive these comparisons. Whether seasonality retains any signal as the asset matures is the open question.