It's a slip of paper that contains a QR code. Scanning it results in opening up a link:
It's a Reddit post, that doesn't seem to strike unusual. Scrolling down the comment section you're greeted with a bunch of confusing entries. It's obvious something went down here. You decide to sort by Old, in hopes of finding that something, until you see it. You scroll down. Further. "What in tarnation" you think, as a cold chill runs down your spine. You close the website, in hopes of never having to look at it again.
Coin!