i always have my own plans and the target of my investment. Based on the market and numbers, i will sell out amount of my bitcoin when the price reaches to 12k and i will holding the rest to waiting for the next wave. Many people go panic of bitcoin's price and sell out as much as they can when the price falls, this is a good time for me to buy in. People should have their own plans for investment and try hard to reach the target of those plans.