What are the crypto billion dollar zombies?

Could you elaborate on the term "crypto billion dollar zombies"? I'm quite intrigued by this unusual phrase. It seems to suggest a specific group or phenomenon within the cryptocurrency sphere, but I'm not entirely sure what it represents. Are these "zombies" some sort of investors who have lost significant sums of money but continue to participate in the market? Or perhaps they refer to projects or tokens that have once been highly valued but have now become dormant or lifeless? In the context of billion dollars, it suggests a significant financial impact. Are these zombies responsible for large-scale losses in the crypto market? Or are they somehow still generating revenue despite their apparent inactivity? I'm also curious about the origins of this term. Is it a recent coinage, or has it been around for some time? And what is the general perception of these crypto billion dollar zombies within the community? I'd appreciate it if you could provide some clarity on this topic. It seems to be a fascinating aspect of the cryptocurrency world that I'm not entirely familiar with.