#加密生态动态追踪 Everyone, today I want to share a painful lesson.

My buddy lost over three million U.S. dollars just like that. You might find it hard to believe— the reason turned out to be a very small operational mistake: he asked his wife to help transfer some funds.

Here's what happened. He sent a screenshot of his seed phrase to WeChat, and when his wife logged into the wallet app on an old Android phone, all the assets in the account were wiped out instantly. The most heartbreaking part is that when they reported to the police later, the police couldn't even file a case.

They spent quite some time uncovering the truth. After I heard it, I got a chill down my spine: that old phone’s browser had a malicious plugin installed, which had long been under hacker control, specifically monitoring the clipboard to steal users' seed phrases. Once the seed phrase was copied and pasted, hackers could immediately access it, connect to their server, and transfer funds. The entire process was so fast that by the time the user reacted, there was not a penny left in the account.

**From this painful experience, I’ve summarized three life-or-death security rules:**

**Rule 1: The seed phrase must be handwritten, with not a single word omitted.**
No screenshots, and definitely don't transmit it through messaging apps like WeChat or email. Your seed phrase is your entire holdings in the wallet, the key to all your assets. Treat it as more important than a passport or property certificate. Focus when writing it down, check it repeatedly, and make sure there are no typos.

**Rule 2: The wallet app must run on a clean, dedicated phone.**
Ideally, use a dedicated device solely for your wallet. Don't install any social media apps, browser plugins, or unknown applications. I’ve seen too many people manage their wallets on a phone cluttered with third-party apps, which is basically like posting your password in public. If any app on the phone gets compromised, your seed phrase could be leaked.

**Rule 3: If family members are helping, supervise in person.**
It's not that you can't trust family, but they may not understand the risks involved in this field. If you really need your family to assist with a transaction, do a video call, monitor the entire process, and confirm each step— from opening the wallet app, checking the recipient address, to pressing confirm— step by step, clearly.

I also heard a detail: hackers' servers usually only keep access logs for 72 hours. That means if you don’t discover the issue within that window, by the time you investigate, there will be no traces left.

**Now, do a quick self-check of your security:**

✅ Is your seed phrase handwritten? Do you have screenshots or digital backups stored on cloud drives or email?
✅ Which phone is your wallet app installed on? How many other apps are on that phone?
✅ Have you clearly explained the importance of the seed phrase to your family? If they need to help, do they know what to do?

In the field of crypto assets, you must be obsessively paranoid about security. Not because the industry is particularly evil, but because once something goes wrong, no one can help you recover. So, before any incident happens, set up these defenses now.