Sell ETH for BTC?

I hold an even amount of ETH and BTC. I am debating selling my ETH for BTC. I split money evenly between the two. I like diversifying but like the safety of BTC long term. Really not sure what to do here. I have a recurring monthly investment of BTC happening, so over time my BTC hold will outweigh my ETH. Curious what everyones thoughts are on this. I also like that ETH seems to pump harder than BTC during a bull cycle.

My largest buy in and hold is in Cardano and I plan to hold that forever. Currently down in that since I unfortunately bought in my biggest chunk near ATH. But I staked and hold over 1000 coins of that and plan to hold it forever so I don’t want to touch that.

Also for clarification I invested for long term hold/growth not any shorting.