I'd say expectations are higher for this year than in 2017 simply because we have already experienced the ATH and since there is a huge price increase at this moment,many people or investors are anticipating the market price to again touch and even break the ATH, unlike before wherein people are almost clueless of how much could the market price be. Many of us are now hesitant to invest at this point because of fear that market price could fall in a sudden without prior notice. There is also a tendency that investors would sell upon reaching the $20k mark, because that was the moment wherein price declined.
The greed is so high where I can say that we are still in the beginning of the mark up phase because there are still institutions or powerful persons who keep acquiring bitcoin right now. I notice that the daily volume is so high compared in the year 2017. The investors and traders are also increased in these past years so for sure that the demand will rise especially when it is now near at the ATH. I'd like to see Bitcoin ranging $30k - $40k next year.