Nothing really groundbreaking here. Nice variation on a bill switch. Would be bill in lemon buskers could find this a nice and cheap place to start. I could see younger magicians and those just starting out getting some good value out of this. Especially if you're in school and there plenty of people to show a quick "got a dollar?" trick to in a day. While Chris Randall uses a poker chip I see boring a dollar bill and using a dollar coin a good way to vanish the borrowed dollar and move into a coin routine and with skill and luck the performance may be good enough that they forget the dollar they "loaned" you. Do this twenty times a day five days a week and that's four hundred bucks a month a good chunk of change for your weekends at Uni's extra curricular activities.
Smilesotheylikeyou