The problem with encrypting things, is that when you go to use it, by definition, it needs to be decrypted. So for convenience, you will keep it decrypted most of the time.

With that said, I use Microsoft Bitlocker on everything I own, so that if I am to lose a flash drive, or something, I can feel safe in the knowledge that it is encrypted.

Devices can be protected by encryption, but data, not so much, as like I say... you will probably have it decrypted for everyday usage.

-John