In my opinion if you has many bitcoin better you sell, seems currently will continue decline.
What makes you say the price is declining i agree it was at $1100 from $1200 but it has come back up to 1200+. Even after etf disapproval the price didn't decrease i wouldn't recommend anyone to sell their coins and just wait for few more months. The price is only growing now the fall in price happens rarely.
Yes the price is only increase and reaching a new phase only few inexperienced amateur will end up selling all their bitcoins in hurry only to regret later and i am sure bitcoin will hit a new height very soon.