These CEOs are aware on how to protect themselves but sometimes it is making me wonder if they do really know. Knowing on how big they are on this market and a simple protection of their social media accounts is one way to show how they're protective over their accounts.
But it seems that no matter how they protect themselves, the attackers are all eyes on them.
Attackers whether scammers or hackers would continuously seek and find a weak spot to anyone in their interest. It does not have to be someone with a high profile such as what happened in this case, but a high-scale attempt sometime does penetrate by the weakest link. For example, there recent hack case where initially customer service are the one who is targeted.
In this case, someone in a position or deemed as high profile should certainly apply good and safe security recommendations. Nevertheless, without a doubt, SMS, which is the culprit in this case, is truly a terrible security mechanism in place. So I don't think he has securely protected his own account, in the first place.