I don't think that your analysis about bitcoins price for the past months are enough, if it drops so what? It is not stable and i think i will go up again after some time. We'll never know if it will go up more or not, so let's just wait and see. Bitcoin proved it's capability in the market for the past few years and i won't doubt it now, besides from the very start i expected and i know that the price of it is not continuous on going up. So, sell your bitcoins of you want no one's stopping you anyway.