well i will sell bitcoin if the price has gone up and bought when the price drop s and this is the key to profit. If it does not go up then i will decide not to sell the bitcoin i have and If you sell all of your bitcoins at not the right time, I can say that your knowledge is still insufficient. You should know that this time is not yet the right time to sell our bitcoins. We should first hold our bitcoins for us to have good future