Banks and physical currency alike.
You can now transfer value simply by having a public/private key pair. No need for banks and their multi-day wire transfers. No need for KYC. You can borrow and lend on a decentralized network within minutes. Invest in markets, make purchases. All without relying on a centralized entity, and without being bound by your government.
Crypto really is something beautiful to the cypherpunk in me.