What is a cryptocurrency node & how does it work?
Could you elaborate on the concept of a cryptocurrency node and its operational mechanisms? I'm particularly interested in understanding its role in the blockchain ecosystem. How does it contribute to the network's security and functionality? Is it possible for individuals to set up their own nodes, and if so, what are the key requirements? Additionally, what are the benefits and drawbacks of having decentralized nodes compared to centralized systems? I'm keen to gain a deeper understanding of this fundamental aspect of cryptocurrency technology.