But banks (particularly Standard Chartered as an example) seem to have also funded a lot of the really early work on Haskell if I'm not mistaken. At least indirectly by hiring people who also work on the core tooling/libraries/etc. Haskell, and functional programming in general has a history of being used and developed heavily in the fintech industry (see Jane Street for OCaml as another example). It's no surprise that cryptocurrency startups would find it attractive and continue that trend. So it really boils down to how ethical you think one group is vs the other, which I think is a ridiculous argument to have. If a specific company or group is doing something unethical/illegal, then name and shame them, but that doesn't seem to be the issue here.
yes, good point, it's been around since the 90s when all of the work done on it was funded by purely academic institutions. I'm 29 years old, and I started using Haskell in about 2009, and I think that's around the time when it started picking up a larger userbase too.