I encrypt wallet.dat w/15 character password using qt and have many backups
Best backup is a paper backup I guess.
All hdd and usb drivers might fail paper might burn but what is more realistic?
Only thing you can be sure of is a brainwallet. The question is, what if you have a stroke or something and forget?
Yeah, I am pretty sure that if you get hit hard enough by the car, the brain wallet may go out the window too. But if you happen to be unlucky enough to get run over by a car, I think your bitcoin wallet is probably the least of your worries...
There is not yet know any method that will give you 100% undestrucrable backup
so true