What kind of cold storage do you use?

[Meuh6879]

method to store WALLET.DAT ...

1) save with bitcoin-core with menu (like usual)
2) make a 7-zip backup of this file
3) close bitcoin-core
4) make a 7-zip backup of the wallet.dat in the blockchain folder
5) copy the wallet.dat
6) make a whole 7-zip backup of all previous files

7) store in many USB key and Hard drive (magnetic !) and microSD card




that ... it's a cold storage !

[888]

I like to keep mine backed up to a few USBs.

[Cred]

The risk of you forgetting a pass phrase, losing a piece paper or having a USB die is probably higher than you getting hacked.

Personally I'd go for an encrypted copy of a key on USBs or paper in at least two locations.

If you have a significant amount then you need to think about the risk of you getting hit by a bus. For this a 5 part key where 3 out of the 5 will produce the main key could work well. Maybe keep 2 at home, 2 with your next of kin and one with a solicitor or bank manager?

[RUEHL]

Electrum portable & addresses generated from offline cached copy of bitaddress.org.

Both of the above are PGP encrypted then the files are encapsulated within an encrypted TrueCrypt volume.

All of the above on a bootable Linux usb drive.

I keep copies in at least 3 different locations.

Like mentioned by earlier contributors, I don't trust paper wallets especially in a bank safe deposit box that can be seized.  Or my house burns down.  Yes I have a fire safe but water damage is also a big problem in case of a fire.  Encrypted digital is so much easier.