Stop giving ChatGPT your biometrics
There is a viral trend on X this week where people upload high-resolution photos of their palms to ChatGPT and ask it to read their future. The model returns a personality read dressed up as palmistry. The replies are full of people calling it scarily accurate. They are also full of the cleanest, best-lit images of those people’s palm prints that have ever existed, now sitting on someone else’s server.
Your palm is biometric data. The lines on it are not a personality quiz, they are a credential, the same way your fingerprint is. You cannot rotate it, you cannot reset it, and once a clean copy of it lives on a remote machine, it lives there for the rest of your life.
A password leak is annoying. A biometric leak is permanent. You cannot change your palm.
The part nobody is telling you about palms: your palm is already a payment credential. Whole Foods rolled out Amazon One across all 500-plus US stores in 2023. You hover your hand over a reader and the till charges your card. No phone, no wallet, no PIN. The system reads the lines, ridges, and vein patterns of your palm, the same surface ChatGPT just collected from millions of users for an entertainment prompt. Amazon is winding the consumer side of Amazon One down on 3 June 2026, but the technology is not retreating. Tencent and Weixin Pay run palm payment in China. JD has it live in Beijing stores. The database of palm prints sitting under all of this is already valuable enough to be worth attacking, and the people seeding the global supply of clean training images are paying customers, not stolen records.
The part that should bother you more: the Ghibli trend was the dress rehearsal. In March 2025, OpenAI shipped GPT-4o and every social feed filled within days with Ghibli-style portraits of users, their families, and their pets. People uploaded the best photo they had of their own face and asked the model to repaint it. The trend was framed as whimsy. Hayao Miyazaki, the co-founder of Studio Ghibli, had already weighed in on AI animation back in 2016, calling it “an insult to life itself,” and that quote got attached to every backlash piece before getting buried under the next wave of trend posts. You can call this a conspiracy theory if it helps you sleep. The math does not change. Two trends, two model launches, one outcome. Hundreds of millions of multi-angle, well-lit human faces went into one company’s pipeline in two weeks. The palm trend is the same playbook with a different body part.
Treat your palm and your face the way you treat your bank login. Do not paste them into a chat window for a horoscope. The fallout from a biometric leak does not arrive in a press release. It arrives years later, quietly, in a cluster of fraud cases that someone else has to explain to a court.
If you want a sober breakdown of why this matters, Secrets of Privacy laid it out cleanly here. Fair warning, you will not look at the next viral prompt the same way.