Buff Cat

The Unofficial Mascot of Robinhood

Buffcat represent the final, stronger, successful version after ditching the original Cashcat name.

The image show the "transformsation" story: weak Cashcat -> jacked "Buffcat" Robinhood. That why people use the Buffcat image to celebrate or reference Robinhood itself on its posts.

It's a fun ongoing joke that flips the origin story into a victory lap for the brand that actually made it.

Cashcat gets the nostalgia, but Buffcat gets the glory as the end result.