This reminds me of the episode where the Q on Star Trek wanting to commit suicide because they were bored of being immortal. https://en.wikipedia.org/wiki/Death_Wish_(Star_Trek:_Voyager...
Of course, that supposes such a level of immortality that we actually do experience anything and everything there is to experience. And we're nowhere close to that yet.
Maybe once I get to see attack ships on fire off the shoulder of Orion. Or C-beams glitter in the dark near the Tannhäuser Gate. Maybe that'd be a good time to die.