There was a crazy trend of fork Bitcoin in the end of 2017. All of them(maybe BCC is an except) are dead.
a surprising number are still kinda hanging in there. superbitcoin hasn't dwindled to nothing yet and some of the crap in my bitpie/bither wallet can still be sold for a bit on their exchange.
i can well believe they'll be subject to some stupid pumps in the future so i'm not getting rid of any, many because it's barely worth the hassle. a lot of coins that are declared dead often make a totally senseless comeback.
the appetite for pumps never goes away and people ain't too fussy what they'll pump. anything with a low supply and bitcoin in the name is exactly what a pumper would stock up on for the future.