I won't recommend any altcoin for anyone to buy but I will talk about few that are worth your every penny, note this isn't an investment advice, you are at your own risk, it's better to do your own research first before making any decisions
1. ChainLink
2. Polkadot
3. DIA
4. Avalanche
5. Tezos
6. Bnb token
I've been thinking about ChainLink and BnB. I'll check the others as well.
Thanks!!