I don't think so. The owners of Gemini are the twins Winklevoss. Their portfolio includes over 40 companies and is growing strong. Have not reasons why this last investment made from them be a failure.
According to them:
"Our interest in Bitcoin began in 2012. It was immediately obvious to us how awesome and powerful this technology was. People laughed, as they always do, when something is awesome, powerful and new, but that only helped to fuel our fire. Over the past two and a half years, we have spent a great deal of time educating ourselves and others about Bitcoin; investing in bitcoin; investing in Bitcoin-related companies; filing an S-1 registration statement with the Securities and Exchange Commission to create the Winklevoss Bitcoin Trust (an ETF focused on bringing bitcoin investment exposure to main street investors) which will list on NASDAQ; and launching a bitcoin price index called WinkDex that will price our ETF (online, iPhone, Android)."
Seems that they act not without thinking and not prepared. Since they had interest about bitcoin since 2012 and had invested early on it these are very good signs that their last investment connected with bitcoin should have a good progress.
For more about their thoughts about this last their initiative you can learn here:
https://blog.gemini.com/welcome-to-gemini/