The Blockchain Association is challenging Citadel Securities over how the SEC should treat DeFi protocols, in a Monday letter tied to the agency's innovation exemption debate. The SEC submission says DeFi protocol developers, validators, front-end interfaces, liquidity providers, and other non-custodial technology participants do not meet the statutory definitions of "exchange," "broker," or "dealer" because they do not exercise discretion, custody assets, or intermediate transactions. The sector is moving away from pure speculation and toward systems that have to survive regulation, audits, and real-world use. That is a healthier phase for blockchain, even if it is a harder one. The market is no longer asking whether blockchain can produce a narrative but whether it can produce trust.