According to analysis shared by TechFlow using Coinglass market data, both Bitcoin (BTC) and Ethereum (ETH) have historically delivered positive average returns in December, a month often associated with increased trading activity and renewed investor optimism.

Bitcoin: +4.03% Average December Return

Coinglass data shows that Bitcoin has averaged a +4.03% return in December across the past 13 years.
Out of these 13 years, five Decembers ended positively:

• 2015

• 2016

• 2017

• 2020

• 2023

These years include major market cycles—from the early adoption phase to the 2017 bull run and the post-pandemic rally of 2020.

Bitcoin and Ethereum often finish the year strong. Coinglass data shows BTC averages +4.03% and ETH +5.64% in December. BTC had positive Decembers in 2015, 2016, 2017, 2020, 2023, while ETH did so in 2017, 2018, 2020, 2023. Will 2025 follow the trend? 🚀

Ethereum: +5.64% Average December Return

Ethereum has posted an even higher average December gain of +5.64% over the past decade.
ETH recorded four positive Decembers out of the last 10:

• 2017

• 2018

• 2020

• 2023

While Ethereum’s sample size is smaller than Bitcoin’s, the data suggests a consistent trend of strong year-end performance.

Seasonal Momentum or Mere Coincidence?

The historical tendency for December gains in BTC and ETH aligns with common market narratives:

• Increased investor positioning ahead of the new year

• Higher trading volumes during holiday periods

• Positive sentiment following major industry events often clustered in Q4

However, analysts warn that past performance does not guarantee future outcomes, especially given the evolving regulatory landscape and higher institutional participation today.