As AI becomes increasingly advanced, North Korean hackers are becoming more rampant. How should we store our crypto assets? Since 2026, crypto hackers have suffered net losses of approximately $2.35 billion. Bitget suffered a $387 million theft, Liquid suffered a $320 million theft due to a sidechain vulnerability, and recently Binance's hot wallet was hacked for approximately $2.5 billion. The question is: Where is your cryptocurrency safest? The answer is not "a cold wallet is all you need." Cold wallets only solve the problem of "private keys not being connected to the internet," not the problem of "people": mnemonic phrases can be photographed and stored on a phone, hardware wallet firmware can be tampered with, and the address displayed on the screen during signing can be replaced. South Korean prosecutors seized cold wallets where the mnemonic phrase and password were on the same piece of paper. True security requires three things to be done simultaneously: First, the cold wallet should be offline; the mnemonic phrase should only be written on paper, not photographed, not stored in the cloud, and not shared with anyone. Second, large sums of assets are distributed across multiple cold wallets, avoiding putting all your eggs in one basket. Third, exchanges only retain a portion of their funds for trading. If a hot wallet is stolen, freezing it is a matter of luck; failure is more common. AI makes it faster for hackers to find vulnerabilities, but what often breaches your defenses is not AI, but your own convenient but misguided actions. Your cryptocurrency storage is not about various tools, but about your habits and storage tiers.