$100k prediction is too much because it can happen only in dreams, many experts also predicting these kind of prices but i think bitcoin will touch only $25k and long term holders will get profit in upcoming months. In December 2017 bitcoin price was $20k so now our expectation is more but no one know what will happen in upcoming months.
$100k isn't an impossible dream at all, actually it's extremely likely - but not in 2019, more like 2021.