As a newbie here, from my point of view, in 2017 the flippening into alt coins to get investors interest. From hedge funds to workers like me started the crazy Bitcoin business.
1. In all of the 2017, the price rises sharply but at the end of the year, big players would like to shake as many people out and away from Bitcoin then go back again. Because they already know the future is inevitable obviously and no one can stop this. What they can do are to let as less people as they can to share the cake.
2. In 2017, governments come to admit the existence of cryptocurrency and balance the environment to avoid fall behind.
3. Stocks also proved this in 2017.
Therefore, I'm optimistic enough that price would rise up to at least $10000. What we should do is to buy, buy, buy and hold, hold, hold.