  The long-term dependence of Bitcoin (BTC), manifesting itself through a Hurst
exponent $H>0.5$, is exploited in order to predict future BTC/USD price. A
Monte Carlo simulation with $10^4$ geometric fractional Brownian motion
realisations is performed as extensions of historical data. The accuracy of
statistical inferences is 10\%. The most probable Bitcoin price at the
beginning of 2018 is 6358 USD.
