"Brother Bao, I lost 5 million U in just one second..."

On the other end of the phone, his voice trembled: "It's right in front of me, the wallet balance dropped straight to zero. I never authorized any operation."
This is neither a leveraged liquidation nor platform misconduct, but a bloody case of "digital asset theft." He reported to the police, but the response was cold and chilling: "It might be a family member's misoperation, hard to file a case."
Speaking of which, the vulnerability has always been part of his daily life: the system hasn't been updated in three years, the home WiFi password hasn't changed in seven years, his phone is loaded with various pop-up apps, and most frighteningly—he screenshot his wallet seed phrase and stored it in his phone notes.
In the world of blockchain, what you think is a "solid wall of defense" can actually be turned into an open door by these small oversights.
I have long studied hacker tactics and often emphasize one point to those around me: "The first lesson in entering the crypto world is not how to buy the dip, but how to protect your assets."
Too many people only think about hundredfold profits, but they put their wallets behind a crumbling city wall. Today, we won't talk about market trends or coin prices; instead, we'll discuss three defensive operations that are far more important than K-line analysis:

**First: Absolutely isolate seed phrases**
Only write them on paper—just paper, only paper. Don't store them in WeChat, don't save them in notes, don't screenshot, don't use the clipboard. It's like sticking your house key directly on the notice board downstairs. The method is simple: write with a pen on paper, keep it in two separate secure locations, and never let it contact any network device.

**Second: Use dedicated devices for critical operations**
If the amount in your wallet exceeds what you can psychologically handle, then set aside a device solely for operations: don't install random software, don't click on unfamiliar links, stay away from public WiFi. Old phones are like sieves full of holes; don't expect them to guard your hard-earned money.

**Third: Regularly maintain your network environment**
Change your home WiFi password periodically, update your router firmware promptly. Many hackers actually sneak in through the "side door" of the home network.

Experienced traders understand: security always comes first. To avoid risks steadily and earn money reliably, you must master the basics of protection.