It is better if you choose them both because eth and btc really have potential and I can say longterm because it has many benefits for people especially in companies that accept bitcoin payment for products even in malls so there are many big people or rich people who are interested in buying and storing because of the future of bitcoin so I would prefer them both to buy because it has a future.
It seems to me that both coins have their own perspectives. Both BTC and ETH can generate good returns. I have no doubt that the correction will not last very long and the coins will quickly be able to return to their previous values. And it's not clear to me why make a choice if you can buy both BTC and ETH and get the same benefits.
Both of these coins should be purchased for long-term storage and both provide almost complete guarantee of profit. Although now Ethereum is certainly losing its relevance. But all this is temporary, ETH will catch up.