Buy ETH with all of my BTC?

I’m a humble beginner and would like to hear your advice.

honestly, I’m someone who don’t want to stress too much and just want to leave my money in a currency for long term.

I bought BTC in a very good time and now wondering if I should buy ETH and just keep it there.

my very limited knowledge- I understand outside of longest existence BTC wins but performance and utility wise ETH has more points.

im keeping some in chain. but thinking of getting more ETH.

have a good day!