Bitcoin is currently in a halving year, so it's most relevant to compare 2024 with previous halving years.
In 2016, there was a 6% increase in September, followed by a 14% rise in October.
In 2020, September saw a 7.5% drop, followed by a 27.7% surge in October.
As for 2024, we're currently experiencing a 9% decline in September, but a potential double-digit October increase could be on the horizon.
Source: RektCapital