Michael Saylor, founder of MicroStrategy, says that new spot bitcoin ETFs from the likes of BlackRock and Fidelity are proving to be more successful than he thought they would be. He believes that Bitcoin has moved up the charts to compete with the SP 500 ETF, and predicts that while gold ETFs are still the largest commodity ETFs in the U.S., they will be surpassed by their Bitcoin counterparts in the near future.