How do swarm bots work?

Could you please elaborate on the workings of swarm bots? I'm particularly interested in how they coordinate their actions to achieve a desired outcome. Do they operate independently or rely on a central command? How do they communicate with each other? Are there specific algorithms or strategies that guide their behavior? Additionally, could you provide some examples of how swarm bots are being utilized in real-world applications, especially in the field of cryptocurrency and finance? Your insights would greatly help me understand the intricacies of this fascinating technology.