Genuine question, what do you mean by "use Cardano"? Use it for what? Can I create borrowing/lending decentralized platforms?

Can I launch my NFT marketplace on it (at this moment)? Or perhaps create a DAO for the governance of a Dapp?

I don't understand how Cardano is even a choice right now.

Polkadot is terrific and has a place, especially in private blockchains.

Cardano is interesting but much less inspiring to me.

But I still think that Ethereum 2.0 will be the public blockchain of choice down the line.