I definitely agree to this one if you want to be a profitable trader in the long run. It take s discipline to have a stop loss and take profit order because there are cases wherein the coin might go up again after you sold it and it would just make you regret that you set a stop loss. The same would apply to take profit wherein there is a chance that the price would continue to go up after you take profit so when your greediness strikes, you will most probably regret it.

However, there is a tendency that the price would continue to go down or the price would go down after you take profit so that would be the time you are glad that you had that order. If you want to be a discipline trader then it's better that you have these orders.