BlackRock released a short video introducing Bitcoin on Dec. 18, with a statement in the subtitle that the bank "cannot guarantee that the supply of 21 million bitcoins will not change," triggering market volatility and rattling Bitcoin proponents, who suspect that large players want to influence the Bitcoin protocol or implement a "hard fork" to increase the supply of Bitcoin. However, Li Zhiwei, president of the Hong Kong Science Park Kepei Network, said that some market participants speculated that BlackRock intended to increase the supply of bitcoin, but BlackRock's statement in the film was actually just a general disclaimer. As a major bitcoin player, increasing the supply is not good for BlackRock, because once the supply of bitcoin increases, its bitcoin spot ETF will also fall in price. (Hong Kong Wen Wei Po)