Bitcoin is not like fiat whereby how much a person owns is visible to centre banks and law enforcement agencies, but rather to the individual and him alone, most especially when he uses a non-custodial wallet. So with all that been said, I doubt if any media will be able to accurately get the total amount of Bitcoin been owned by celebrities except if been said by themselves on live interview, of which I'm sure no celebrity can never review the exact amount of money he/she owns on live TV. Hence, this remains a speculation, until fully verified from reputable online source, such as BBC, CNN, or other crypto related news platforms. Because though I expected you will a link, but all I could see is a link to a Chinese telegram group with articles all written in Chinese.