At two thirty in the morning, the phone vibrated and made a clanging sound on the bedside table.

Opening the group message, I could hear the sobbing in Lao Zhou's voice message: "Brother, I'm done... The three million yuan I saved for my son's study abroad fund is all gone tonight."

His wife just wanted to help transfer some money, following the steps he had taught her. As a result, the wallet was just opened, and six transactions cleared in three minutes. Contact customer service? They only replied, "On-chain operations are irreversible."

I asked him the first question: "Did you take a photo of that string of words, or did you save it to the cloud?"

Silence.

Ten seconds later he said, before the business trip he was afraid his wife wouldn't understand, so he took screenshots of the key information and marked them as "Operation Guide" and threw them into the family group. He also recorded a demonstration video.

This is really not new. I saw a report last year that nearly three-quarters of the cases of lost crypto assets were caused by human error—not technical attacks, but rather leaving the door open.

After almost ten years in this line of work, every time I encounter "children's tuition"