Silkroad is just pretty scam, btw!
I've an idea.
Start a BTC trading site,
Run it till you get a load of BTC in your system,
Transfer all of the coins to another of your account,
Publish the press that your site have been hacked,
Blame it all on hackers,
$$$PROFIT$$$
and the funny thing is no one can do anything if they decide to just run with your money
same if you get robbed, if someone steals your credit card the credit card company will fight for your money "really it's their money", if you get mugged on the streets you file a police report and you probably have a 1% chance of finding the person let alone getting your money back.