The proposed rule change was not enough to get SEC approval for the "Winkevoss Bitcoin Trust" - the news led many to believe that other proposals for cryptocurrency ETFs from others such as VanEck and BitWise will face similar fates.
VanEck and SolidX have also filed a joint application for a bitcoin ETF, which was published for comment on July 2. According to Dodd Frank rules, the agency needs to take action within 45 days of the publication of that proposal, which falls on August 16. This week, the agency SEC delayed deliberations on five bitcoin ETFs filed by NYSE Arca, Inc. Asset manager Bitwise joined the list of hopefuls on Tuesday, and filed for an ETF that would track a basket of cryptocurrencies.
https://www.cnbc.com/2018/07/26/winklevoss-twins-bitcoin-etf-rejected-by-sec.html