no encryption would help you since the computer at some point has to know your private key to sign a transaction
I thought the Trazor signed the transaction?
It does, I was referring to when you just run a client and then encrypt your wallet in fancy ways. Most of that is useless.
The more I think about the concept of this device the more it seems to be intended for idiots. All theater, no actual security.
This is when people will stop answering you, but some of the smartest people in bitcoin endorse this and actually have helped to make it more even more secure. I guess those people are idiots.

And you think endorse equals use? I doubt those smart people would care to entrust private keys to a new device. Not to mention they are selling it for so much they all probably got a piece of the pie.
But then it's intended for people who know nothing of security. Google "security theater" maybe it will help you realize why you wasted your money.