Across the multiverse, some universes support life. Some life-friendly universes contain advanced civs which create simulations. The physics of our universe supports an enormous number of sims per basement universe. Thus most of the copies of ourselves probably exist in/as sims.

Realizing this, it matters very very much what kind of sim most of our copies live in. Across the landscape of potential simulator-gods, some are friendly whereas most are not.

A general cooperative strategy emerges: we should precommit to winning the sim arms race. The best sim-god is something like a future version of ourselves - closely aligned to our values. If - at some point in the future - we can create a huge number of sims of our past selves, than we can ensure that our sim is benevolent, and contains a positive afterlife.