It's very interesting to know your opinions.
I did not know blocknet and wavesdex, only "nxt" and "bisq", and I'm starting to learn the last one.

I think security and usefully will be the next big target for 2018 (decentralized and centralized), and I'm impatient to know how it will work.
Also, future laws and regulations could be a big point to consider which kind of exchange needs to use.
Thanks to share your opinion.