Two datapoints are enough to define an exponent, so I chose two similar super-fast jumps over 3000 and 5000.

That translates into approx. 0.75% per day growth, and it might reach 9000 at the end of 2017:

Exponential growth based on low prices, ignoring highs.

For data, I used BTC-e prices from bitcoinity. Two datapoints are enough to define an exponent, so I choose two dates during relatively low/quiet times:

2015 oct 1, $235

2016 oct 1, $608

And here's the result:



So a pessimist (who believes in exponential growth ) should expect $2000 at the very end of 2017, and $5000 at the end of 2018.

Enjoy!