Which of the following is a decentralized digital currency?

A decentralized digital currency operates without the governance of a central authority, middleman, or clearinghouse.

• The Architecture: Bitcoin achieves decentralization through a technology known as Blockchain—a shared, unalterable ledger that records transactions across a global network of computers (nodes).

• Verification: Instead of a bank verifying a transaction, the Bitcoin network uses cryptographic proofs and consensus mechanisms (like Proof of Work) where independent participants validate transactions. This removes the risk of a single point of control or failure.

• Contrast with CBDCs: Currencies like the digital dollar or RBI's Digital Rupee are digital, but they are state-backed fiat currencies, meaning their supply, validation, and rules are absolute monopolies of their respective central governments.