It's true what you say, investing in bitcoin is long term, unlike altcoin, short term investment, but both investments have different advantages and disadvantages... if you buy bitcoin, the profit may not be as big as the profit from altcoin, but if we look at the disadvantages, altcoin is more the loss rate is greater than bitcoin.
My advice, if you have a lot of capital, it's better if you just buy Bitcoin, even though the profit is small compared to altcoins, that's okay... if you buy altcoins, I'm afraid you will suffer big losses and even your capital will run out.