<p><img src="https://images.cointelegraph.com/images/840_aHR0cHM6Ly9zMy5jb2ludGVsZWdyYXBoLmNvbS91cGxvYWRzLzIwMjQtMDIvYmYyMTA3YWYtYTA2YS00Yzg2LTljN2MtOWVjYmZkODI5YzVhLmpwZw==.jpg"></p><p>Users of some crypto exchanges based in the United Kingdom now need to pass a quiz to trade Bitcoin.</p>