It should be described so buyers can beware, but it's a personal choice to decide whether someone trust Musk and his estate planning
Fund managers and the like do, which covers a lot of passive investors, which is good until a company joins one of the major indices at which points funds may be obligated to buy in.
It's a deeply distressing moment, and I see it as a time to renew calls for consumer-protecting regulations and antitrust laws with more teeth in the markets where this kind of behaviour's currently flourishing.