Price will be 70 k end of 2018.
Different people have different predictions about the price. Time will tell us the right price at the end of this year. I think that 70k is a huge amount and 100 k is far beyond the limits. People are investing in a huge ratio but may it not reach to this level.
There is a huge gap between todays price and 100k. It is possible in the next few years but may not possible in the next year. The price fell down at the end of the year.
Huge gap in price (90 k$), but not in percentage, as it's less than 1000% rise. We did better in 2017 jumping from 1000$ to 13 k$ (+1300%). Indeed the gap in price is smaller (+12 k$).
From now, however, 100 k$ will be hard to reach in the near future if bitcoin doesn't evolve to be able to sustain high transactions number that a wider adoption supposes. Bitcoin will have to find solutions as segwit or Lightning Network to be able to support more transactions without asking for higher fees and too much time.