if I have cold money or money to invest maybe I will buy BTC and both ETH because I am sure these 2 coins will set a record all time high during the halving based on my predictions maybe these 2 coins will be the ones I will buy when I hold money that should be invested for your information. I also set aside my monthly salary to buy or pay off these 2 coins every month.
Actually it's not a bad choice even though one of them is an altcoin, but as has been seen in previous halvings that altcoins like ETH can also experience a bigger increase after the halving for Bitcoin even though basically there won't be much impact on any altcoin through that. However, what has been seen in the real market is that when Bitcoin experiences an increase in price after the halving, most of the altcoins that are in a better position in terms of market capitalization will also experience an increase in price. So you won't be wrong if you want to choose both to hold as an investment for your future.
Well most people frawn at members here trying to actually share their investment and hold it in altcoin but the truth is that some altcoin actually do pose good value especially during the bull. Like you said Ethereum is a good choice but there are also many other altcoin that can portray such high sense of pump during the bull market but the only issue now is knowing that particular altcoin which can portray this function as some of them do dump as quickly as they do rise.