eth is ok, and as for long term investing i also can recommend u uniswap, polkadot and new dex - xsigma
Choosing tokens for long-term investment must be really careful and careful, I also like ETH and Polkadot tokens, but on the other hand I also like some token exchanges such as BNB and others, I chose this so I don't get stuck with rising tokens only when there's hype.