Some crypto currencies do shield payments using zero-knowledge proofs. Within public blockchains like Ethereum, there will eventually be more layer two rollups

Some crypto currencies do shield payments using zero-knowledge proofs. Within public blockchains like Ethereum, there will eventually be more layer two rollups that can support privacy through zero-knowledge proofs. Polygon Nightfall is one: https://polygon.technology/solutions/polygon-nightfall/ https://polygon.technology/solutions/polygon-nightfall/