FOMO was a factor in the run ul to $19k, there was an expectation that bitcoin
would keep going and so a lot of newcomers took a chance and bought into
the hype. I know of a few college goers who bought into it around October
which was not a good time if you were getting in to ride the train unless you
sold in December.
Of course it all happen again but it might not be for another 2 years.
I think the $ 19k Bitcoin is just a matter of time, and I believe it is possible for this to happen in 2018. Blockchain technology is truly a revolution in the field of management technology and Bitcoin is the most paid coin in the market. I am very optimistic about the future of Bitcoin and the cryptocurrency market.