From: Release No. 34-83520; File No. SR-CboeBZX-2018-040

Subject: SR-CboeBZX-2018-040
From: Saino Hiromichi

July 12, 2018

Virtual currencies are still a early investment and we can not add it to the ETF yet. Especially PoW coins including Bitcoin has security risks. How do you protect people investing in ETFs when 51% attacks occur? We have to carefully choose a more secure and practical currency.

BrownTabby