But those companies only exist because the US regulatory framework allows them to exist as long as they follow the rules. If the CEO of Walmart sent out an emai

But those companies only exist because the US regulatory framework allows them to exist as long as they follow the rules. If the CEO of Walmart sent out an email saying that everyone was fired and that all stores should be demolished, he would be fired by the board of directors within hours. Also other executives would respond to the email telling everyone to ignore the previous email while they see if the CEO was hacked. The entire point of crypto is to bypass the regulatory framework. In some cases that may make for a more robust system in some cases it may not.