Bitcoin and Ethereum are off the table. It has to be an alt.
What is an alt in your mind and definition?
Altcoin is alternate or alternative cryptocurrencies which imply all cryptocurrencies that are not Bitcoin, should be considered as altcoins. With this classic definition that does not need to be changed by anyone, Ethereum is surely an altcoin, in the past, the present and the future.
What project has the tech, the team, and the community to actually survive and come back stronger? Which coin are you betting on when all the hype and tourist money disappears?
If I have to pick an altcoin to hold, it is Ethereum, and if you force me to pick another one, it's BNB, nothing more to hold in my cryptocurrency bag. Other altcoins are shitcoins that are very weak and vulnerable to death callings from bear market.