I have to disagree with ALL of your prediction.
Taking BTC as an example, if by the end of 2018 its price were to be $72,415, its market cap would be $1.216 trillion... not very probable as the current market cap for ALL of the cryptocurrencies is less than $750 billion.
We went from 100 B to 750 B in a year, that would not be as big an increase for coins to top 2-3 trillion. But we will see :). Plus a lot of these numbers in the market cap are not real. New coins get added with 100,000,000 market cap but the liquid is not there.