Investors must always prioritize Bitcoin because it is like the main crypto coin. Sure, Bitcoin has a good stability, it always becomes the number 1 in crypto space. Meanwhile altcoins can change instantly, it is the characteristic of altcoins. They sometime can increasing very high but they also can freefall in a short time. It also influences the position of the altcoins on CMC, the position can be changed. It is different with Bitcoin, Bitcoin never changes its position.
BITcoin is a stable coin. You can hold it for the long term and you won't lose the value of your money. But if OP asks which coin is more profitable I think the answer is not bitcoin. Yes, of course altcoins are an option because there are many tokens that can give you returns of up to 100%. If you want to gamble with your money then you can choose meme coins. You can try speculating but I'm not sure about meme coins. There are several meme coins that I own but I see that meme coins are not something that promises more profits. You will lose your money if you choose the wrong project, and you will get the jackpot if you choose the right project.