Make a buncha fancy belt buckles. JB Weld one to a sidewalk in downtown LA a get the popcorn?
You wouldn’t want to waste a gold coin by gluing it to the sidewalk; someone would chisel it loose right away. Reminds me of many years ago, when my sister superglued a dime to the sidewalk in front of her third-floor apartment so that she could drop water balloons on the backs of people’s heads when they bent over to pick it up.