Just trying to be more neutral in my analysis of the question, there’s major issues with the stock exchange, some of them would be solved by the adoption of blockchain, I’m not saying it would make everything better, I’m just saying that OP’s top comment might have been a bit exaggerated.

Hell, even the efficiency thing, if it’s centralized and they have their own network (instead of relying on an existing network) it can use the same amount of energy as the system they’re using right now…