Whether or not you could keep that $100K is another matter entirely.
Robbing banks with a gun is not much different from people (aka 'banks') robbing you with a fountain pen, ethically and legally speaking. Read up on the Cyprus Banks and the Bail-In. https://www.forbes.com/sites/nathanlewis/2013/05/03/the-cypr...
It would make for a funny movie scene that a bank robber tries to rob a bank and finds out its "cashless". Maybe they steal the pens? Or try to get them to write out a cashiers check? Then they have a problem with the printer and the triplicate forms they need to fill out.
It'll make DHS salivate when you prove that the need for high speed, AI drone defense is greater than currently is deployed.
You'd probably sell a full stack solution with a "Jolly Bank Robber Cookbook Manual 2022" to prove the risks going fwd along with successful live field tests.
Tellers are trained to be very polite to bank robbers, which throws them off. Most bank robberies don't even involve a gun right away. They're written notes asking for smaller amounts of money. The clearance rate is 60% which means about 40% don't get caught.
However, before anyone sets down this path, you should probably consider that it might be easier to make $100k just working at a bank.
Reminded me of this Key & Peele sketch: https://www.youtube.com/watch?v=jgYYOUC10aM
Robber 2: So how do we get the money?
Robber 1: That's the beauty of it, bro. They deposit the money into our bank accounts, week after week, month after month. They're not even gonna know they're being robbed! And then 20-30 years later, we walk out the front door like nothin' even happened.