Subject: SR-CboeBZX-2018-040
From: Mark Guest

July 17, 2018

Good morning Sir/Ma'am,

I personally believe the approval of the COBE ETF would be a monumental milestone for the citizens of the United States. It will allow the larger investors to invest in the new innovative technology with security measures in place to protect those who invest. Most importantly, the approval would stimulate the crypto currency markets for both the large and small investor as a whole.

Sincerly,

Mark Guest