What I like about cryptocurrencies, whether it is bitcoin or any other yet-to-become major cryptocurrency, is that it is impossible to steal it, unless you use torture.
I know very few theftproof things. Actually I don't know any of them.
I can put some gold in a safe, but any thief with appropriate tools can open any safe. I can hide it somewhere in a desert place, but anyone could just find it and take it.
Real estate is so easy to steal if not protected by public force. Diamonds are small so you can easily hide them, but still, it's not perfect. I've heard that during WWII, some jews hid some value using very rare philatelic stamps. It's good, but not very reliable, imo.
Cryptocurrencies are theftproof, as long as cryptographic functions can not be broken. And so far, they can't. Therefore the only key to access your wallet, is the passphrase you stored in your mind.
If I'm right, if cryptocurrencies are really theftproof, then they are priceless.
Somebody must crack your computer's security or social engineer their way to get a copy of your wallet. However, if you spend your money first, than it doesn't matter what the criminal do.
Cryptographic functions are the hardest to break, but other things are much easier.
