Any idea which blockchain would be used in a Tokenized Stock Market?

Larry Fink (Blackrock CEO) mentioning a future where stocks are tokenized.

Source: https://www.cnbc.com/amp/2024/01/12/blackrocks-larry-fink-says-bitcoin-etfs-are-just-the-first-step-in-the-technological-revolution-of-finance.html

If it pans out that way, any idea which Blockchain would be used? Would it be new developments? Just live on a CEX?

Any known information about the tech/blockchain or leaks out there about this?

If it’s an existing blockchain, the id imagine that its native token could surge to be one of the most valuable.