I am not an expert, I just took the edX blockchain for business last year and have experimented with the Pact contract language (lisp like, it is implemented in Haskell) and Exonum.

I like the term Distributed Ledger Technology (DLT) and my interest is in permissioned (private) systems for use in business, potentially tied into AI (my placeholder site: http://hyperledgerai.com). This is on my free time, and in my free time I have become more interested in neural networks combined with symbolic AI code.