A fursona is also free (technically. Getting art of them can be expensive, but there are a few various "paper doll" style tools you can use to draft out a basic concept for free), is priceless in value, and doesn't fluctuate in its value based on arbitrary economics.
NFTs were always stupid. Figuring out that something is stupid 2 years later than everyone else shouldn't mean that you sue someone, it should mean that you go home, feel embarrassed, and shut up, so people forget how stupidly you behaved.
If you're going to invest money into something, do your research first. How anyone thought these would be a good investment is beyond me! More money than sense.