I'd say Cas coins are probably one of the only physicals that have a wide spread as well as audience. The ones talking about it are probably just the ones who really really loves them, nothing more.
I know of more than 20 people who all have at least a couple of cas coins. And that's just in my small circle, some of the people that post here in collectibles are not in that circle. There's also apparently a huge audience on ebay, buyers that nobody has a clue about. Same with newbie accounts getting created here weekly looking to sell some old cas coins they bough in 2013/2014.
I'd not worry too much about it