In a Washington courtroom this September, a 22-year-old Singaporean named Malone Lam pleaded guilty to leading a cryptocurrency theft ring that extracted hundreds of millions of dollars through the oldest vulnerability in any security system: human trust. His group did not break through walls — they knocked on doors, wearing borrowed faces, and were let in. The case reminds us that as digital wealth grows, the most sophisticated lock remains only as strong as the person holding the key.