When the spot exchange-traded funds (ETFs) were set for release in early 2024, the main metric many looked at to differentiate the many options was the expense ratio or the amount of fees charged by the ETF sponsor. For some, the fees were relatively low, but others, such as Grayscale Bitcoin Trust (GBTC), were high. This difference became apparent when GBTC began experiencing huge outflows after its ETF was converted from a futures-linked ETF to a spot ETF. Many who had invested in GBTC when it was futures-linked were selling their shares and flocking to the newer and cheaper ETFs. Investors …