Bitcoin's core features are rooted in its technological design and economic model, primarily reflected in the following four aspects:

· Decentralization: This is the most fundamental characteristic of Bitcoin. It does not rely on central authorities such as central banks or governments for issuance and management but is maintained by countless voluntarily participating computer nodes worldwide, collectively maintaining a public ledger. In theory, as long as the internet exists, no one can unilaterally stop or control the Bitcoin network.
· Fixed Supply: Bitcoin's total supply is mathematically and protocol-locked, permanently capped at 21 million. This inherent scarcity makes it different from fiat currencies that can be printed infinitely. Supporters often refer to it as "digital gold," believing it has the potential to hedge against inflation and serve as a store of value.
· Secure and Transparent Transactions: All historical transaction records are packaged into "blocks" and publicly available on the chain. The ledger is fully open, and anyone can access it at any time. Additionally, once transaction information is confirmed by the network, it is almost impossible to tamper with, ensuring the system's security and credibility.
· Global and Permissionless: Bitcoin's account system is similar to email; as long as a key pair is generated, it can be used. In theory, any country and any individual can participate. It also supports 24/7 global transfers, with fund transfers not dependent on traditional banking hours or border restrictions.
These four key features together constitute Bitcoin's unique value.