These days, I've been talking about concurrency and sharding again, and the narrative is quite lively, but after staring at the memory pool for a long time, I’ve become a bit more calm: running fast doesn’t mean running stably, especially when it comes to asset security and exit strategies, those are the things that will keep you awake at night. To put it simply, you need to think clearly about how to withdraw if something goes wrong, what to do if the bridge breaks, who will bear the slippage when liquidity dries up... Don’t end up realizing you can only "queue up and wish" on the chain. Recently, retail investors have been complaining about validator income, MEV, and unfair ordering, which I can understand. Sometimes, you think you're trading, but in reality, you're just paying tolls for others.