I'm sure it is better to invest in bitcoin and altcoins. In my portfolio there is about 40% in bitcoin and 60% in altcoins. However, I think to buy more altcoins, because you can make a good profit by investing in altcoins.
I do not still know about it although I have been dealing with the cryptocurrencies for many years. Suppose that you need to invest in different altcoins and Bitcoin to get the best profit faster.