Both are great investments.
BTC was the 'founding father' of cryptocurrencies whereas ETH was built on top of the BTC framework to include more advanced and better features. ETH is considered the 'founding father' of smart contracts in the blockchain.
I wouldn't say one replaces the other. Both are significant in their own ways.
I agree with your opinion, and for me both have their own advantages and disadvantages, and for myself both are good for long-term investment, in the world of ethereum market it is also easy to exchange to various altcoins that exist in the market.BTC was the 'founding father' of cryptocurrencies whereas ETH was built on top of the BTC framework to include more advanced and better features. ETH is considered the 'founding father' of smart contracts in the blockchain.
I wouldn't say one replaces the other. Both are significant in their own ways.