~ Do people hodl just because others are HODLing?
Buying low and selling high is the trading or investment strategy of most people, buying low and selling at the expected price in order to obtain more profits.
~ Why so people hold rather than sell and buy again when low
They choose to hold for a long time because they believe in the market potential and its technical potential, and believe that the price will eventually rise, and the future will be more potential and valuable.