This article delves into the origins, features, and challenges of Bitcoin as the world's first decentralized cryptocurrency. It analyzes Bitcoin's level of decentralization, its finite supply, and why it is referred to as "digital gold." The article also discusses Bitcoin's limitations in transaction speed and smart contracts. It introduces upgrades like SegWit, the Lightning Network, and Taproot, which have been adopted to improve transaction efficiency and scalability. Additionally, the article explains how Ordinals technology enables Bitcoin to support NFTs and how Layer 2 solutions such as Liquid Network and rollups enhance Bitcoin's functionality. Finally, it looks ahead to the future development of Bitcoin's programming, including cross-chain compatibility, DeFi potential, and native application platforms, highlighting the innovation and evolution within the Bitcoin ecosystem.