Grayscale's BTCC and BPI ETFs aim to generate returns by selling covered call options on Bitcoin's upward trend. The current annual dividend yields are 59.36% and 19.93%, respectively. Investing $10,000, the annual dividends for BTCC and BPI are approximately $5,900 and $1,900 (pre-tax and before fees). However, recent dividends have been classified entirely as return of capital, which means that as the fund's net asset value declines, investors may have recovered their principal.