You suppose to sell when you make profit simple..do not sell when you loosing.. the law says buy low and sell high. My best friend was trading bitcoin and mae over 4120k and bitcoin started dropping and he sold at $62K now he lost almost $58K but guess what aftr he sold bitcoin hit over $16000 per coin that month if he has let his coin he would have made over 4380k but now he has lost all hope.. Buy low and sell hih simple.. never sell when the market is lowcos of fears