Highlights:
Bitcoin is defying seasonal trends with an 8% increase, marking its best September since 2012.
For September 2025 to surpass previous records, a 20% increase is required.
BTC price volatility is at levels rarely experienced during an atypical bull cycle.
Bitcoin (BTC) has recorded more gains this September than any year since 2012, setting a new bull market benchmark.
Data from CoinGlass and BiTBO shows that with an 8% increase, September 2025 is positioned as Bitcoin’s second-best month ever.
Bitcoin dodges “Rektember” with 8% growth
September is typically Bitcoin’s weakest month, averaging losses of around 8%.
This year raises the stakes for BTC price seasonality, as historical data suggests the next bull market peak, alongside other risk assets, is due to hit new all-time highs.
While both gold and the S&P 500 engage in price discovery, BTC/USD has consolidated throughout September after achieving new highs in the previous month.
Even with an increase of “only” 8%, this September’s gains are sufficient to mark it as Bitcoin’s most successful in 13 years.
The only other September that outperformed for Bitcoin bulls was in 2012, when BTC/USD soared by approximately 19.8%. Last year’s peak was 7.3%.
BTC price volatility dwindles
The statistics reveal an extraordinarily unusual peak year for Bitcoin’s bull market.
Related: BTC ‘pricing in’ what’s ahead: 5 insights on Bitcoin this week
Unlike previous bull markets, BTC price volatility has diminished in 2025, contrary to the expectations of seasoned market players based on past trends.
Data from CoinGlass indicates that volatility has decreased to levels not seen in over a decade, with a particularly sharp drop occurring since April.
According to on-chain analytics firm Glassnode, the intensity of BTC price pullbacks from all-time peaks has remained mild this bull market.
Previous drawdowns recorded as much as 80%, whereas the largest drawdown thus far in 2025 is only 30%.
This relative stability in volatility is reflected in bull market outcomes, with BTC/USD struggling to match earlier cycles.
In July, Cointelegraph reported potential for a 50% price surge following notably low signals from the Bitcoin Implied Volatility Index.
This article does not constitute investment advice or recommendations. Every investment and trading decision carries risk, and readers should perform their own research before making choices.
