I have an analysis of cointegration between Bitcoin/Ethereum (in python) if folks are interested, https://andrewpwheeler.com/2022/02/09/cointegration-analysis...

This was over a year ago, so dynamics could of course have changed. But based on that analysis, BTC tended to lead ETH (Bitcoin goes up, ETH goes up). ETH up lead to BTC down though.

Not a trader, so don't take it as advice. Impressed by folks who beat the market, it always appears too volatile to me in my amateur stat modelling attempts to even kid myself.