In May 2010, a Florida man Laszlo Hanyecz, now known worldwide as Bitcoin Pizza Guy, offered to pay 10,000 Bitcoins for food. A British guy took the offer and paid $25 for a box of Papa Johns pizzas delivered to Hanyecz. In May 2022, a single Bitcoins market value was around $30,260.80. If the British guy held on his 10,000 Bitcoins from 2010 to 2022, what would has been his annual investment return (in %)?