Are commemorative banknotes of Hong Kong 2008 Olympic Games collectible?

Yes China Hongkong 2008 Olympic Games commemorative banknotes represent the prosperous contemporary image of China and its 5,000-year historical and cultural heritage. Now commemorative banknotes are still appreciating. It can be predicted that the historical and cultural value and collection value of Olympic commemorative banknotes will continue to increase with the passage of time. In 2008, China Bank Hong Kong Branch issued a special commemorative banknote with a face value of HK$ 20! The circulation is 4 million. Hong Kong Olympic commemorative banknote is the first Olympic-themed commemorative banknote issued in history, which integrates Olympics and charity and promotes the spirit of "People's Olympics".