The biggest crash in the history of BTC has been occurred from 2 days ago till now. It' all over now. If you don't buy after reading this post you will cry soon.
already $10k... can it go back to $20k or may be higher by end of 2018?
we will never know whether bitcoin can penetrate 20k usd or not in the future, but because of my belief that bitcoin will be the most desirable thing someday in the future, then I have to make a decision to buy and hold bitcoin for a longer time.