Recently, people keep saying, "I saw it on the chain, so it must be real," but the premise needs to be clarified: what you see is who provided the data on the chain. If node synchronization is slow, RPC load is high, or index services are a bit delayed, your "real-time" might actually be a "few minutes ago replay." To put it simply, it's like ordering takeout—looks like it's still on the way, but the delivery person has already turned into your neighborhood...

The AI agent/auto-trading wave is even more obvious: some people are touting "full automation," but I care more about which RPC provider they use, whether they run their own nodes, if failure retries will cause slippage or high fees, and whether they expose you to MEV. Anyway, now when I look at on-chain data, I ask more questions: who is the data source, what’s the latency, how are missed blocks compensated? First, account for these frictions before discussing whether the strategy is reliable or not.