As blockchain technology evolves, cryptocurrency is steadily entering the mainstream financial market. This article provides a comprehensive explanation from a beginner’s perspective, covering foundational concepts, operating mechanisms, and representative projects. It also introduces the differences and application scenarios of hot wallets, cold wallets, and other mainstream wallet types. Using Gate.io as an example, it demonstrates the actual trading process of crypto assets, including platform registration, identity verification, fiat deposits, and crypto purchases. Finally, it illustrates the diverse use cases of cryptocurrency in real and digital worlds—such as charitable donations, creator tipping, virtual real estate, and DeFi applications. This article serves as a one-stop entry guide for beginners, helping them understand and safely participate in the crypto ecosystem.