I used that because it was charitable to the fiat argument because you could put both the fiat and crypto into the hidden hole in a way that would make seizing fiat money as difficult as seizing the crypto. If you don't like that, you can simply memorize a seed phrase in your head, it will accomplish essentially the same thing in a far more practical and more commonly practiced manner. If you insist on the realistic case it's far more charitable to crypto than fiat but I stretched it to be kind to your argument -- clearly a mistake since you only took it as an opportunity for hostility.