[sans-serif]

Keys normally grant access so worst case once they're compromised you can take the server offline physically. Even private signing keys can be revoked though some damage may have been done.

With Bitcoin, once it's copied, you can consider it gone forever, irrevocably, in totality.

[repsilat]

I thought the idea was if someone copied your bitcoins it was essentially a race to be the first to spend them. I guess if you're stealing bitcoins, though, you're going to be quick to run them through a couple of transactions to claim ownership of them.

(Of course, my understanding might be completely off-base.)