The coin sound comes from Nintendo's Super Mario Bros., first released in 1985, where collecting a coin triggered this bright chime and added to the player's score. As Mario became one of the most recognisable characters in gaming, the sound travelled with him through sequels, spin-offs and countless remakes, becoming shorthand for a small reward. Online creators later adopted it for edits, streams and short videos because listeners recognise it instantly, even out of context, and it still signals a win in a single second.