Altcoin price movement is affected by Bitcoins fall. Big investors have dumped a large amount of their investment for the later rebuy option. There are even some regulations that are being taken and that has influenced the fall. This phase which is currently present on the market is taking to long by my opinion.
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I also hope as all the common investors that the prices will start to rise soon because this holding is boring. I cannot trade currently because I will end with a loss and that is a concern with all traders that are using the crypto market.