Earlier quoted context omitted.
Not only is Bitcoin sent frequently, it's also stolen frequently: http://rt.com/news/bitcoin-hacking-stolen-million-417/ http://www.nbcnews.com/technology/250-000-worth-bitcoins-sto... http://www.esecurityplanet.com/network-security/czech-bitcoi... edit: unrelated, someone should make an index of how many Bitcoin threads hit the front page of HN per day.
It's well-known that you can at least secure your bitcoins as well as you can secure gold, if you use cold wallets. The advantage, however, is you don't have to worry nearly as much about the security of a transaction (moving it from one place to another)
But since Bitcoin is digital, its maximum security is far, far higher. Your private keys can be encrypted and safely stored with any desired level of redundancy. Paper wallets are a big step backwards.
Also, if secret sharing is used, Bitcoins cannot be stolen unless the attacker gets to k of the n involved parties.