Maybe time to keep your bitcoins until we know the result of the ETF, if it is approved, maybe we will see a surge in price
But I am sure in future we are going to have so many ETF which will be bitcoin based. So, I am sure even this time Winklevoss brother fail this time, they or some other people will bring bitcoin etf into existence one day or other for sure. (Only concept will be the problem, if anyone innovate a concept, someone will bring it into reality. That is what history emphasize to us all the times ).
I mean to say regardless of this time ETF's approval, I will be holding my bitcoins at least till my retirement (I believe it would take another 25 years to get retired).