He's very obviously bringing this up because he's been having conversations with one of his thirty Rasputin wannabees. He can't help but repeat the conversations he's been having. This obviously started when he rode the ambulance, wore the hand makeup, and started talking about getting into heaven. Now he's been informed he's dying of something, and he's progressed to coping about Super-Ivermectin with RFK and whoever else.
Obviously anything is possible but this sequence of events has a near 100% certainty
I cannot imagine how messy and dramatic he would be if he dragged the entire country into his personal struggle session with his own mortality. It would be so weird and funny.
I'm not expecting it, though. A lot of the Trump medical speculation just seems like cope. He's old and not in good health, but also has access to the excellent, exclusive healthcare. Of course he's gonna have a lot of hospital visits and be taking a lot of medication.