How do hackers make money?

well - let's explore this

A hacker, let's call him Fred, once he has possession of identity can do many things

1. if Fred has your user id and password to your banking website, he could change the mailing address they have on record for you to a PO Box of his choice, and start receiving checks.
--> the downside to this one is, there will be some sort of paper trail on the PO Box, so he could get caught

2. if he doesn't have your computer IDs, but does have your statements - Fred can then try his best to use social engineering to convince some well meaning teller to 'help' him reset the password.
--> the downside to this one is, he'd have to either make a call (traceable) or see someone in person (on film) and therefore could get caught

3. or he could just use the assets in your account to BUY his favorite penny stock, and not have to bother transferring anything out. In this case, it's much harder to find him as

From Riches to Prison: Hackers Rig Stock Prices | Threat Level from Wired.com