I will be happy if this happens, but I don't think it is likely.
It would need a huge bull-run to start, and this may happen, but then I think a lot of people will remember what happened in the last huge bull run and there will be many people selling before they think the price has gone too high. So I think history will follow us and the only way to pass the sorts of prices you've said is through a slow and steady rise. A jump to those prices by the end of 2018 would I think be too dramatic to be sustainable.