The ETF pioneered by the Winklevoss twins could have increased liquidity for the bitcoin market and made exposure to the currency easier to attain. The price of bitcoin is down $200 as a result of the SEC's decision.
Had the SEC approved the Winklevoss effort, it could have significantly increased liquidity for the bitcoin market ― not only by encouraging retail investors to participate, but also investment advisors with larger bankrolls. More diverse bitcoin exposure also could have helped reduce price volatility, although anticipation of a more favorable ruling had caused the price of bitcoin to spike: Bitcoin prices are now tanking in reaction to the ruling, down more than $200 at last check.
https://www.axios.com/sec-kills-winklevii-bitcoin-etf-2309635551.html