I think it will be 20 times more than this year's price, given that the steem app, an upgraded wallet and also if a chat function or 'people you may know' type function is here on Steemit itself. I saw that Bitcoin rose from about 1000 to 17000, i.e. 17 times in this single year, and so did the others, but not Steem.
Reason is the biased distribution of rewards. Quality and quantity and no of followers and likes everything must matter. There has to be some solution for this.