Midnight, my phone received a voice message, a developer with five years of experience choked up: "My 3 million dollar study abroad fund is gone." His wife clicked on an "Airdrop Claim" link, and the family account assets were instantly transferred to a black hole address. He finally said something that sent chills down my spine: "I thought as long as the code was secure, it would be fine. Turns out the vulnerability was in the living room."

Cases like this are so common in the crypto world that they’re frightening. Someone took a screenshot of their seed phrase and uploaded it to a cloud drive named "123456," only to be completely locked out by ransomware later; someone transferred funds over a public Wi-Fi at a cafe, and their address was tampered with; others wrote their private keys in a phone memo, lost their phone, and their account was emptied in two hours. After seeing so many of these cases, I realized one thing: the risk of crypto assets is ninety-nine percent not in the technology but in daily habits and human vulnerabilities.

I’ve summarized three life-saving rules: avoiding one pitfall is like earning yourself an extra house.

**Pertama: Seed phrase harus dipisahkan secara fisik**

Seed phrase adalah nyawa dari aset, tetapi sebagian besar orang pernah mengalami jebakan—menyimpan di ponsel, di cloud, mengirim "backup" via WeChat. Ide-ide ini terlihat hati-hati, tapi sebenarnya sangat berbahaya. Biaya serangan hacker jauh lebih rendah dari yang kamu bayangkan.

Metode paling andal yang pernah saya gunakan adalah yang sederhana dan kasar: beli sebuah pelat logam tahan api dan korosi (harganya puluhan ribu), tulis seed phrase secara manual dengan pena, lalu kunci di brankas rumah. Kalau tidak punya brankas, cari tempat tersembunyi, yang penting jauh dari perangkat elektronik apa pun.