The crypto market is not constant and always fluctuate from time to time. Through this series of fluctuations crypto traders make profit and also suffers some losses in their day trading. Cryptocurrencies are volatile and so never expect the market to be always up all the time, there is surely going to be some lows too 
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the existence of demand and supply on the market greatly affects the price. supported by rumors, news, and speculation that circulated, enliven the analysis techniques to predict price developments. full of surprises and unpredictable things, so don't miss information or you will lose..