What to do if bitcoin decreases?

The only thing to do is hold and wait for bitcoin to go up again. Compare special currency with confidence and belief, if no one can predict when a coin rises or falls, it may take a long time to rise again, so if you invest during investment and then dump after a period of time, please wait until another pump to prevent loss, if not a few profits, then at least return the investment. Patience is very important in trading. If we don't have patience, we will make wrong decisions because of lack of patience.