What's happening is that the futures markets are going short on bitcoin and 3 other of the top coins. Before the futures markets, it was all bulls. With the futures markets the bears are making themselves heard.
Besides, what good is a currency if it keeps going up in value? Volatility is bad for business. With bitcoin trading in a narrow range, the value is predictable, and that makes it usable.
What you really want is for people to use bitcoin right? A stable value will encourage that to happen. What you want is transaction demand, not speculation demand.