Trezor is a hardware (cold) wallet and it’s the first of its kind developed for Bitcoin. It’s also the pioneer in adding a passphrase feature to the devices. It basically prevents anyone from breaking in and stealing your funds, even when stolen. Such devices are easy to deal with. What is more, Trezor Wallet has a wide range of third-party integrations and is considered the safest way of keeping your funds safe. A nice addition is the fast and adequate customer support, a useful advantage.