Subject: SR-CboeBZX-2018-040
From: Harrison Seletsk

July 12, 2018

Blockchain technology could be as groundbreaking and revolution as Guttenberg's printing press. As someone who is technology apt, I am fine with the technical risk involved in trading cryptocurrencies. For 99.9% of Americans, this is still not the case. A regulated and insured ETF would open up the accessibility to this amazing technology, and allow it to continue to flourish and hopefully improve America and the globe at a basic, infrastructural level. A SEC regulated bitcoin ETF is a step in the right direction, and I really hope you pass the proposal.

Thank you,

Harrison Seletsky