Don't lose enthusiasm, if you have been in losses for a week or two stopping will be the best option. Take time to think of something better that you can apply to your trading technique otherwise you can just buy and hold and wait until the value of that coin goes higher. You can stop trading for the moment but you can continue buying if you are long term with some coins that you think will bring fortune to you one day. Everyone experienced losses but it's up on how you will look at it, as positive or negative learning.