Because the Trust is currently the only fund of its kind specifically for bitcoin, investors have been paying a high premium. In Sept. 2018, shares of GBTC traded at a high of $7.95, which was around 20% higher than the value of the bitcoin within the trust that each share represented at that time. Although that premium is significant, it’s lower than it has been in the past — GBTC has closed at prices more than two times the value of its underlying bitcoins. Grayscale offers that prices are dictated by the market and not by Grayscale itself, so price fluctuations may be a result of supply and demand.