<p><img src="https://images.cointelegraph.com/images/840_aHR0cHM6Ly9zMy5jb2ludGVsZWdyYXBoLmNvbS91cGxvYWRzLzIwMjQtMDgvZjBiODQ5MTEtMGEyMC00NjcxLTkyYzAtMGJhYWFlYzEwYTY3LmpwZw==.jpg"></p><p>The pace of adoption of crypto exchange-traded funds in the United States has been surprising even to Grayscale. </p>