If I had terminal cancer,
I would give everything I have away and donate. I would do crazy things I normally wouldn't do, such as dive off the tallest cliff in Jamaica, pilot a learjet without prior flight training, as in I would learn as I'm flying and land it myself, parasail 1000 ft above the water, and jump out of a plane chasing down the parashoot that was thrown out the plane 3 seconds prior, like that one movie lol.
When I get really weak, I would also sit in a extreme class doing 170plus burps. lol