Quote from: abhilodha on August 10, 2021, 12:33:55 PM

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.

Yeah, you are correct. The use of offline transactions signed on airgaped machine is more secure than a trezor. Despite the fact that trezor is hardware wallet the funds hold there are still open for a few attacks.
I will refrain from mentioning the side-channels attacks as they are too sophisticated to be applied to ordinary user but would like to stress your attention on ransom attack that could be possible in the case your PC (to which Trezor were connected ) were compromised.