Bitcoin is up around 7% in September following a 25% gain in August, positioning it to break a decade-long pattern of negative Septembers after positive Augusts and achieve three consecutive monthly gains through Q3.
What it moves
Bull vs bear
Bulls see the break of the historical August-up-September-down pattern as confirmation that institutional flows and spot ETF momentum have structurally altered BTC’s seasonal behavior, supporting continuation into Q4. Bears argue the modest 7% September advance remains vulnerable to profit-taking and macro risk-off moves, warning that any failure to hold above recent highs could quickly retest the August breakout levels.