Do NFTs use proof of work on a green blockchain ledger?

Yes.

Is the ledger unchangeable?

Yes

If someone steals my NFT and remints it or shares it without my permission, will Aleda.store remove it?

Yes.

Can I store my NFTs in Aleda.store’s vault?

Yes.

Can I gift my NFT to someone else?

Yes.

Can I sell my NFT on the Aleda auction site when it launches?

Yes.