Ethereum has consistently outperformed Bitcoin in January returns since 2016, according to data from Coinglass. Ethereum's average January return stands at +20.63%, with a median return of +31.92%. Over the past nine years, Ethereum's January performance was positive in five years and negative in four. In comparison, Bitcoin's average January return since 2013 is +3.81%, with a median return of +0.62%. Over the past 13 years, Bitcoin's January performance was positive in seven years and negative in six. These statistics highlight Ethereum's stronger performance in the first month of the year compared to Bitcoin.