Andreessen Horowitz (a16z) has identified a critical challenge for decentralized finance (DeFi) in supporting real financial markets: the need for predictable transaction inclusion. While blockchain technology has advanced to handle high transaction throughput, the predictability of transaction confirmation remains a significant hurdle. This unpredictability can lead to price degradation and arbitrage opportunities, undermining the competitiveness of on-chain markets. The report suggests that current blockchains, which often rely on a single-leader block production structure, are susceptible to censorship and delays. To address these issues, a16z proposes two solutions: providing short-term, predictable transaction inclusion guarantees and introducing information-hiding mechanisms to prevent frontrunning. These measures are essential for blockchain to serve as a reliable financial infrastructure, ensuring transaction execution certainty and fairness over mere throughput.