The integration of blockchain as the internet's underlying protocol raises complex antitrust law applicability issues. Blockchain's decentralized nature challenges traditional monopoly definitions, as no single entity controls the network. However, concerns arise when dominant players leverage blockchain ecosystems to exclude competitors or manipulate markets. Antitrust laws, rooted in centralized market structures, struggle to address decentralized systems where power dynamics are fluid. Jurisdictions differ: the U.S. focuses on consumer harm, while the EU emphasizes market dominance. Critics argue current laws are ill-equipped, urging new frameworks to tackle blockchain-specific issues like token concentration or governance control. Others believe existing regulations suffice with adaptive enforcement. The debate underscores the need for global cooperation to balance innovation and fair competition in a blockchain-driven internet.