I have made some loss in trading in the past but it never made me disappointed as it was a learning experience for me and if I would get disappointed then I would stop investing my money in trading and profits and loss will always be a common practice in bitcoins.
In the start every trader lose their money with which he have started the trade that is why many expert often suggest to start trade with lowest amount of capital after learning when he officially start the trade then he can invest high and then he will not lose much so he will not be disappointed from trade.