Brothers, I have to ask a very practical question: the K-line charts you watch, the indicators you rely on, the stories of the tracks you believe in—all ultimately come back to one fundamental issue—are the prices you see on the protocols you use truly real?

I've seen too many tragedies. There was a guy who was trading leverage on an emerging DEX; the market was moving normally, but his orders were precisely sniped. Only after checking on-chain data did he realize that the price used for liquidation couldn't be found on major exchanges. The reason is simple: that protocol only relies on a single oracle for price feeds, and that data source had a problem. Overnight, what was lost wasn't just money, but trust in decentralized finance.

To put it plainly, DeFi's "decentralization" is only half done. The trading logic is on-chain, but the data source might depend on a single team's server. It's like a fair court where the evidence is provided by only one person.

How big is the risk? A single data source being attacked or manipulated can poison the entire protocol. Server crashes mean all applications relying on it go blind. The most heartbreaking part is that you can't verify where the data comes from or whether it's real.

This is the pitfall that DeFi often overlooks. Oracles are not just supporting roles—they determine the security of your funds.