Subject: Release Nr. 34-83520 File Nr SR-CboeBZX-2018-040
From: Ken Brook

July 18, 2018

I got into blockchain because it promises to give all people the right to own their identity in this new digital world and it enables people to be compensated fairly for their trade/skills. I believe that to be fundamental to one’s happiness and pursuit of a fulfilled life. You can’t have blockchain without cryptocurrencies. I support responsible regulation and hope we get this right.

Thank you for your time.

- Ken Brook