If we actually did not want to contribute to the loses then we should stop selling.  Whenever you sold your bitcoin below the purchase price you are making loses including contributing to the falling.  I so much believe in the future of bitcoin and others cryptocurrencies especially those one that has makes great impact in the past. 
If we keep holding there is no way bitcoin will keep falling.  The big buyers and bank wish we should keep selling so their can control the market.  I think we should not feed the whales but nature bitcoin until it grows to the level we wish it should be.