Lets say i want to transact a very important huge amount of btc transation of my life. Which one should i chose between Offline signing transaction via Electrum(gpgverified) or trezor bought from official site. This is a hypothetical question. i want some expert opinion to confirm my bias that offline transaction on airgaped pc is more secure than a trezor.
Cold storage wallet means that your private key will never come in contact with online. Private keys will be in written form in a metal or something that is not easily damaged. Because online contact only has a chance to leak, Otherwise, it is protected.
Hardware wallet is also secured if you believe the provider, cause they said there is no feature in HW to reveal your private keys though it is stored your keys and you have to connect it online.
So, HW is less secured than cold storage.