I'm in no way suggesting that this will happen to him (and hope it doesn't) BUT I'm pretty sure that there's a whole variety of interesting ways to go that don't involve ill health.
For example; according to statistics from 2011, 5 people die per year of accidental suffocation in bed. No...
Indeed you do, apologies, I appear on there twice and the first time only has Prince Philip and Trump. If I'd bothered to scroll down rather than jump the gun I would've noticed, sorry!