The world’s fastest-growing ETF, the iShares Bitcoin Trust (IBIT), is nearing $100 billion in assets, less than two years after its launch. That puts it among the 20 biggest ETFs, only 18 of which are in the$100 billion-plus club. It clearly shows demand for digital assets, or at least for one product. BlackRock dominates the crypto ETF category, with the next-biggest competitor, Fidelity’s Wise Origin (FBTC), being roughly a quarter of the size. Of course, BlackRock is also the world’s biggest asset man ...