In the cryptocurrency market, there are already hundreds of DEXs (decentralized exchanges). However, Momentum Finance (@MMTFinance), built on the Sui blockchain, is not just "another DEX." Today, we will explore why Momentum Finance, which is set to have a sale on @buidlpad, uses the Move language. After its beta launch on March 31, 2025, this project recorded a TVL of $558 million in just six months and reached third place among global DEXs with a daily trading volume of $1.1 billion. It was fundamentally built on a different technological philosophy. In most programming languages, variables can be copied or deleted. For example, if you copy the code balance += 1000; twice, it becomes 2,000. But real money doesn't work that way. If I take out 1,000 won from my wallet, that money should no longer be in the wallet. The Move language implements this simple yet important concept at the language level. A special data type called Resource cannot be copied and can only be explicitly moved. Just like physical currency, it can only move from one place to another and cannot be created or disappear out of thin air. So why is this important? Currently, the most widely used smart contract language, Solidity, does not have such constraints, so if a developer makes a mistake, they could mint tokens twice or permanently burn them. In fact, many hacks in DeFi history have exploited such logical flaws, resulting in hundreds of millions of dollars in losses. However, Move prevents such mistakes at the compilation stage, ensuring that hacks due to errors do not occur. Momentum's CLMM contract consists of over 10,000 lines of Move code. Yet, in the audit conducted by Movebit in October 2025, no critical vulnerabilities were found. This is not a coincidence. Move Prover has mathematically verified the following properties: 1. The issuance of LP tokens when adding liquidity exactly matches the mathematical formula. 2. Fees are never double-charged. 3. Position NFTs can only be withdrawn by the owner. These properties are not just "passed tests" but have been proven to always be True for all possible input combinations. Additionally, in October 2025, Momentum started a bug bounty program with HackenProof. The reward system is: - Critical (potential fund theft): $20,000 - $200,000 - High (logic errors, oracle manipulation): $2,000 - $20,000 - Medium (denial of service): $500 - $2,000 - Low (minor issues): $100 - $500 The maximum reward of $200,000 ranks among the top in DeFi protocols, demonstrating a serious investment in security. As of now, the number of reported critical vulnerabilities is, of course, zero. I believe the biggest threat to DEXs is exploits, and currently, Momentum Finance is working to bring this probability close to zero, and I think they are on the right track. This might be the key reason why Momentum Finance uses the Move language. To keep users' assets as safe as possible.