In fact, all the altcoins you mentioned are recommendations that people often give. If you want to focus on 1 altcoin, then it's ethereum. I think, when the halving comes, having Bitcoin and Ethereum in our wallets will be a very good thing. Actually, Bitcoin alone is enough, however, if you want altcoins, then Ethereum is also good enough. If you want to add another altcoin to your portfolio, then choose the 10 best altcoins on CMC.
When the halving occurs and BTC reaches a new ath, of course altcoins will also follow BTC's rise, so many people take advantage of this moment to reap profits, especially the top 10 coins on CMC, of course this is the best choice to add to our basket besides BTC of course.
But I agree with you, it would be better if we don't be tempted by how many coins we have to buy, just focus on two altcoins like ETH and XRP. Because buying too many types of altcoins actually makes us dizzy, it's better to focus on two altcoins but we are effective in following developments so we can get maximum profits. Facing bitcoin holdings, in my basket there is only 50% btc, 30% ETH, and 20% XRP.