I think there might be days where you will either lose a lot of money or just stay in the trade in the hope for the price to rise the other day. On other days you will make profit. The question is if you will make profit or loss in the long run. In crypto world you have very few fundamentals (in the contrary to the stock market) and its always a bit like playing Lotto. Currencies which are very popular today may be worthless tomorrow and of course the other way around.
Oh, and don't forget the costs (fees for transactions and transfering money) which will be deducted from your profits. In the end it might be far more profitable to buy and hold for several years.