Most of Billionaires are O?

 According to this video, most of billionares are O.
你的血型決定你的命運，O型血最有錢？AB型血最稀少？ | 老高與小茉 Mr & Mrs Gao

Mark Zuckerberg O - Facebook
Steve Jobs O - Apple
Bill Gates O - Microsoft
Masayoshi Son O - Softbank
Jeff Bezos B - Amazon
David Koch A - Koch Industries
Sam Walton O - Walmart
Amancio Ortega O - ZARA
Warren Buffett O - Berkshire Hathaway
Jack Ma O - Alibaba
Liu Qiangdong O - JD
Ma Huateng O - Tencent