And ideas on what the marketcap will look like at the end of the year?? I say 1.5 trillion

I really don't have idea what will be the 2018 year end marketcap. I really like to know your basis why you say it will become 1.5 trillion. My assumptions is if the rate of increase would be the same this year then the marketcap would be 3.0 trillion. Please elaborate your analysis for the benefit of discussion.