Hardware wallets are regarded as one of the safest means of storing bitcoin and other cryptocurrencies. Each device grants the holder possession of their private keys and adds a PIN code plus other tamer-proof tech for enhanced security. Hardware wallets are not impregnable, however, as one British man found to his peril after purchasing the device on Ebay.
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https://news.bitcoin.com/mans-life-savings-stolen-from-hardware-wallet-supplied-by-a-reseller/