Its always good to diversify your investment and one should not dependent to only just 1 coin even I have also many different-different altcoins and I would say you can also check and more research about these coins as I feel its worth to buy for longterm: Aeron, B2Bx, DeepOnion, Ethereum, BNB and Tezos.
Dividing assets is an important thing for profit and certainly safer, I never depend on one or two coins because now there are thousands of coins which of course all have the chance to be profitable.