I'm confused by this comment. What do you mean "seized by fiat"? Custodial wallets can and have been seized by government agencies. Cold wallet storage devices can and have been seized. Bitcoin has no intrinsic value, only imputed value.

Nobody can order the bitcoin network to freeze assets of Johnny Wanted the way they can order banks and other financial institutions. Nobody can stop you getting paid even for non-criminal activities the way Mastercard/Visa do.

If you lose or surrender you private key - fair enough, but that's not the same.