The issue the author is worried about is that the crypto companies are taking advantage of Haskell's public prestige to imply a level of robustness and rigor that doesn't actually exist: this incredibly incredibly shady company can't be that shady since they're using such fancy technology.

> In this new era the Haskell community itself has simply become a tool to buy legitimacy and pump token values. The reputation of our community is now used to defraud the public and convince non-technical users of the soundness of an utterly unsound investment.

So when people realize that 50% of crypto entrepreneurs are scammers and the other 50% are deluded, and the bubble pops, there is a serious concern that Haskell will be publicly understood as a "cryptocurrency" language and will suffer a reputational hit.