The money travels in millions over your head.
depends what you mean by money, liquid assets maybe sometimes but its impossible to just grab it
digital currency is just a representation of your wealth not your actual wealth
or at least thats what i understand of it
He's intercepting cash flow reports sent between banks, that way they know which banks have lots of cash, which ones are due to get a refill et cetera.
Remember that this movie predates the internet so it's probably over something like https://en.wikipedia.org/wiki/Radioteletype
Typically, the only ones using any form of encryption back then were the military.
When I was given this I could hear radio communications from local police
I could do that too once with my amplifier. Just needed to put a cable in and use that as an antenna, and I think the volume had to be turned all the way down and it recieved the signals of two local radio stations at the same time. Was pretty fun to listen to that.