Subject: File No. SR-CboeBZX-2021-019
From: Bryan B Solstin

June 17, 2021

Bitcoin has the largest digital coin market cap at $700 billion and continues to lead providing digital coin liquidity. Bitcoin's liquidity reduces the risk of manipulation compared to other digital coins.

Bitcoins blockchain is more transparent than any fiat currency.

Bitcoin is decentralized and is caped at 21 million coins. There are no pre-mined coins and 21 million cannot be manipulated. The same cannot be said about other centralized digital coins or fiat currencies. WHERE IT COUNTS MOST, Bitcoins decentralized design and cap prevents fraudulent and manipulative acts.