Ka-ching is a widely used money sound effect rather than a single meme quote. It echoes the familiar sound of a cash register or payout chime, which made it an easy shorthand for wealth, purchases and rewards across video edits, games and short-form memes. The clip stays popular because viewers understand it immediately, even without context. Online creators often pair it with a simple ding sound effect for cleaner transitions or use it as a punchline when showing expensive items, earnings or sudden success.