If you believe USD will maintain its value (which historically it hasn't) and that banks will not steal your money (which historically they have), then why even use Bitcoin. You're arguing the wrong points, it's not about who can be faster than who, "I can change database values faster than anyone!" It's about guarantees on that action and no central entity (e.g. Bank) can match the guarantee provided by the decentralized, trustless nature of Bitcoin.