A trader just made a million dollar bet that Bitcoin would be over $50k by the end of 2018 A large trader (or traders) just plopped down a million dollars betting that Bitcoin would hit $50k sometime in 2018.
Anything can happen so we all dont know what its going to be, the best thing you got to do is have patient and monitor the price frequently as much as you can, cause its very important to monitor the price cause you might have to cut your loss at times.
So like I said anything can happen, we might see the price climb to $30k or even $50k by the end of this year, or it can even drop to $2k. Thats why they say that the price of Bitcoin is volatile.