I am a believer in the simulation theory and because scientists have a theory of multiple universes, why not combine the two.
Scientists may have found evidence for a multiverse.
Maybe there is an infinite versions of you. A version that might be succesfull (or might be… religious (the horror).
If the multiverse exists, then it isn’t unfeasable that on one of these universes they have such advanced computers that a simulation could be made of infinite universes, so… it isn’t unfeasable that we already are in one.
So, my favourite theory, derived from my favourite movie (and favourite author, and favourite philosopher) just became a little more feasable.