1) why bitcoin price gone this much down?
2)why bitcoin price fluctuate too much?
3)which features affect on the fluctuations of price of btc?
4)Is bitcoin price affect on altcoins? If yes then which altcoins price get affected by it ànd which are not?
5)when we should see the price increament in BTC?
2.market fluctuations are influenced by the large number of transactions that cause the volume of transactions are also large then cause a long distance between the sell order and buy order.
3.same as answer number 2
4.of course, since all altcoins are essentially decentralized, meaning that all price changes are influenced by bitcoin development.
5.It depends on you, if u are a trader must know when to see the movement. If u only token holder may be better if u discuss more often in bitcoin forum or more read about bitcoin news.
Including the manipulation of whales that affect bitcoin price crash to altcoins prices drops. Well the market will get back before the end of 2018. That is my belief to this very hour.