"Eating coins is very helpful to the digestion," you explain to the astonished crowd as they watch you gobble up coin after coin!
This requires that you master and use the French Drop and Pass, which is offered here on this site. Sort of on the "geek magic" side, this will fascinate and wrench the stomachs of any audience.
Complete with a DVD of my own comedy routine, this can be a real audience draw and will bring folks back to see it many times. Can be combined with the Miser's Dream, Bending Coin, Coin in the Bottle and more...