You'd have to rob a lot of banks to get to $100K, however. And the FBI is very effective at catching bank robbers. It would be pretty low on my personal list of illegal ways to get money.
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.