Many things predicted in the 80s didn't happen and won't happen. That's just the way things go with the total majority of predictions.
Even the most richest person in this word can make any prediction but 90% of that will not happen, same thing in cryptomarket everyone is making their own prediction and yet not all of them succeed. Today the market are still down, and cryptomarket is not moving high maybe 2018 is the year for bear, so this prediction remains negative.