I agree with you that altcoins are not for newbies because of the risks they bring, but it should not be denied that altcoins are also a very good way to make profits if we know how. ...
If there are doubts about which coin to invest in, you can see where large companies such as Grayscale invest. Their open-to-all portfolio shows that big business invests not only in bitcoin -
https://grayscale.com/products/ But with all the variety of different coins in the portfolio, the largest percentage is allocated to bitcoin.