Sapan Shah, a 24-year-old graduate student at Lehigh University, has created a tourist attraction of sorts for bitcoin enthusiasts.
Since he began accepting the digital currency at his Allentown, Pa., Subway franchise two weeks ago, bitcoin fans have been coming from out of state to visit his sandwich shop, Shah told CNBC on Tuesday.
"Right now a lot of enthusiasts are coming in," he said on "Squawk on the Street." "Bitcoin enthusiasts are coming to show a lot of support for this. A lot of kids are coming two or three hours to drive. We're getting a lot of students from local areas who have studied bitcoin and understand it."
(Read more: Somebody tell Jared: This Subway takes bitcoins)