Decentralized data marketplaces can disrupt traditional data trading models by enabling peer-to-peer transactions, enhancing transparency, and reducing reliance on centralized intermediaries. Built on blockchain technology, they ensure data ownership, security, and immutability, allowing individuals and organizations to monetize data directly. Smart contracts automate trustless exchanges, cutting costs and mitigating risks of data breaches or misuse. Unlike traditional models, which often favor large corporations and limit user control, decentralized platforms empower data providers with greater autonomy and fairer revenue sharing. However, challenges like scalability, regulatory compliance, and user adoption may hinder their dominance. While they may not fully replace traditional systems soon, they offer a compelling alternative, driving innovation in data economies.