Definition ∞ Mining pool risk refers to the potential vulnerabilities and centralization concerns associated with the collective operation of cryptocurrency mining pools. These risks include the possibility of a single pool accumulating a majority of a network’s hash rate, which could lead to a 51% attack and compromise network security. Additionally, the operational integrity of the pool operator, including potential for fraud or mismanagement of rewards, presents a risk to individual miners. It represents a significant factor in network decentralization debates.
Context ∞ Mining pool risk is a recurring topic in discussions about the decentralization and security of proof-of-work cryptocurrencies like Bitcoin. News reports often highlight the concentration of hash power among a few large pools, prompting concerns about network resilience and censorship resistance. Debates continue regarding protocol adjustments or incentive mechanisms that could mitigate these centralization risks and promote a more distributed mining landscape.