I have done a full-disk encryption so any authority wanting to investigate my online activities wouldn't even have access to any information on my device. I also consider it way more convenient than physically destroying my device before CTBing. Also, if I were to fail I could easily access everything again.
Not my intent to worry you, but authorities have a considerable amount of ways of getting into full disk encryption.
Stuff like windows bitlocker is completely worthless - (official) backdoors aplenty!
Also if they detect you have an encrypted partition, the assumption in court is often now that you are guilty by inference.
If you're using something more robust like TC/VC then minimum change the default seed. Don't want to derail the thread any further but happy to discuss in pm if anyone wants any proper tips and pointers.