Everyone has their own thoughts and opinions, I also only choose bitcoin for large investments, for ethereum I only hold a small amount. Because I choose other top coins that I think have higher profits than ethereum if held for the long term, of course waiting for the bullish season to sell.
Good, strategy but we need to acknowledge the domain of both assets, Bitcoin is good, secure, reliable and the king of the market, and ETH is also reliable, not that secure but way better than other shity projects and also a name with domination in the crypto market. Bitcoin is considered as a store of value, a safe investment, an inflation hedge, and the most secure payment system even if it's a little expensive sometimes. At the same time, ETH has a great ecosystem behind it, L2's Defi, Liquid staking, and much more related to financial applications.
Both are the overlords of their domains, yup ETH has many competitors and Bitcoin is the only brand haha.