The rapid and spectacular rise of digital assets has positioned crypto trading platforms in the world leadership of cryptocurrency markets as bastions of trust. Platforms, from central exchanges to decentralized protocols, are charged with the responsibility of processing millions of transactions daily with trustworthiness, availability, and fairness among users across the world. But as the industry matured, two central concerns are at the center of the controversy: scalability and fairness. While both are central to ultimate survival, their intersection creates special challenges.