When we see the loss of dominance of bitcoin, I find it logical to turn to the alts, especially that there are beautiful projects
Altcoins are going bit high but bitcoin is still king of crypto so I will go from the bitcoin because its profit rates are very high and it is the easier way to get maximum out of you own money, those who have not enough capital they can try altcoins but those who are established bitcoin is truly favorable for them and they will start getting profit on very next moment of buying as well so all these are facts that shows bitcoin is leading.
Bitcoin will be the king of crypto for a long run, but apparently Altcoins are recently growing crazily and few even gave more return within a Quarter. So its better to indulge in alt as well, ya its difficult to identify the special ones but if you can you will surely make greater profits. For new investors 60% in Alts and 40% in Bitcoin or upto your risk taking capability you can increase the ratio towards altcoins.
I use bitcoin as the fiat currency for my trades. Otherwise investin fiat money is a mess to the exchanges. This way I also hold some few bitcoin as the stock value of my portfolio.