A good crypto portfolio is composed of both bitcoin and altcoins. It's true that the profit potential of the two has a huge difference but bitcoin is much more like to be a safe investment since it's already proven that its price continously increase over the years. While investing into altcoins can be risky because with so much of them in the crypto market, it's hard to choose what will give you a profit more than 10x of your investment. There is no guarantee that your altcoin investment will bring you your expected profit.