Nope that will never happen.
Bitcoin will not go down lower than 10.000$
This is a pretty insane thing to predict, it is certainly not "guaranteed" to not go under 10$k and there is a good chance it will.
Okay yea maybe it can go lower than 10k , but it will never hit 1k !
If it goes lower than 10k it will go to 7k max.
No one knows what will be the price of bitcoin at the end of 2018 but 1 thing for sure i'm confident it will not drop @ 1800$. Year on year you can see BTC price chart fall at the first quarter of the year and may start recover again in the late part of the second quarter onward. if Bitcoin will fall in 1800$ all crypto coins may affected and that would be a collapse for crypto world. BTC price has huge effect to other coins whether it is going down or going up.