If you think it is enough to have BTC, you may diversify again your money into some altcoins with higher risks if you want. ETH and DOT are also my choices. But never follows what other people do. Just make your own research from now.
Those are good choices so if you're done stacking bitcoin and you think that you've got enough then proceed to your next choice of those altcoins. ETH is one of my top choices after bitcoin. So if you're trying to get as much as you can and balancing the portfolio you've got.
You should choose the best that you think that will fit your portfolio and you truly like because it is your money that you're investing and not the others to intervene with your decisions.