Just for fun, I've developed a monte carlo simulator for Bitcoin (or really it can be used for any empirical distribution).

Simulating 1000 random walks out to 7.11.2018 produces the following "prediction":

1000 random walks ending on 2018-07-11T00:00Z

Average Close Price: 10297.871828929912

Median Close Price: 9580.614030757966

Max Close Price: 31071.8910745536

Min Close Price: 2277.196877248253

80th Percentile Close Price: 13531.952141619598

Which can be visualized by this chart:

I also ran 10,000 random walks (all hail the Threadripper) with the following results:

10000 random walks ending on 2018-07-11T00:00Z

Average Close Price: 10253.35880964114

Median Close Price: 9389.700623245808

Max Close Price: 50481.52524964556

Min Close Price: 1586.7458787213823

80th Percentile Close Price: 13445.03327374023

Again, this was just for fun so don't go betting your home equity on it!