What is the evil Nyan Cat?

Excuse me, could you elaborate on the notion of the "evil Nyan Cat"? Is this a reference to a mischievous or malevolent version of the popular internet meme featuring the anthropomorphic cat riding a rainbow and leaving a trail of popcorn? Is there a specific cryptocurrency, project, or individual in the finance and cryptocurrency world that has adopted this term, and if so, what is their purpose or motivations? Additionally, what implications or concerns does this concept of an "evil Nyan Cat" raise within the realm of cryptocurrency and finance?