In the first Bitcoin theft of its size, a user has lost 25,000 BTC — or nearly $487,749 at today’s market rates — to an unknown thief. While the Bitcoin community has always been quick to point out that it’s harder to forge a Bitcoin than to forge a dollar, it’s quite easy to take someone else’s Bitcoins: all you have to do is gain access to their computer’s hard drive. Once you’re in, stealing Bitcoins is easier than taking a wallet in the real world, and there’s no recourse for getting them back. That said, it is possible to...