I’ve no doubt many billionaires are happy, but thinking you can outsmart the grim reaper is a tad sad. It doesn’t matter how rich or poor you are, we all have to learn to accept the inevitably of death. I learned to cope with death a long time ago, we all have to at some point.

You're coping. It wasn't "my first thought". I read the whole article and came away thinking "pretty sad and strange man". You can't take it with you, and his solution is apparently to try and escape death. It's sad. I don't find many very very rich people sad, but I do find this one to be.