Not just medicine.
Watch for mechanics shops that go under, to re-open in the owner's home garage on a cash only basis. Software consulting to be paid in bitcoins. "Bountiful Baskets" and other attempts to enlarge farmer's market reach.
It's starting, and it's exciting.
I live next door to one of those. He had an automotive & motorcycle shop on a high-traffic street in town. City decided to schedule street maintenance such that all access to his shop was shut down for months during his busiest season. He went under, had to declare BK.
As they climbed out of that hole, they looked at the current economy and said [Sigourney] Screw That! [/Sigourney], and began to provide service to the bikers that had been their regulars. Now, in addition to bikes, he does the occasional car or truck.
Very discreet. I have no problem with them at all.