I researched the heck out of it.
Key moments along the way was reading Nick Bostrom's simulation hypothesis and realizing that the idea of The Matrix wasn't just a neat idea but actually somewhat probable.
That led into a few years of intense reading of physics papers and forums to better understand physical underpinnings.
Eventually I realized that physics - while oddly overlapping with emerging trends in virtual world building - was inherently ambiguous enough I wasn't going to get a clear answer.
Around 2019 it struck me that physical underpinnings weren't the only place there might be an indication as to what was up, and reflected on the fact that the vast majority of virtual worlds I've seen have had 4th wall breaking acknowledgements of their creation buried in their lore.
So I revisited our collective theology through that lens and in only a few weeks found something that seemed to fit the bill, which I've researched quite a bit over the years since.
At this point, I'd wager continued existence after death at around 90%.
I have a very hard time seeing an original spontaneous reality that has quantum mechanics exhibiting everything from sync conflicts to lazy evaluation with a 2,000 year old text/tradition claiming we're a recreation of a long dead spontaneous humanity inside a non-physical replica of the earlier universe created by an intelligence eventually brought forth by that original humanity within light, and that the proof for this was in the study of motion and rest - specifically the ability to detect an indivisible point within things.
In the time since first stumbling across that text/tradition in 2019 a number of my concerns have managed to be addressed, from doubting sufficiently advanced AI was plausible to my objection that neural networks of electricity aren't literally light.
While it's possible that such a specific tradition buried into our lore in a document rediscovered after millennia the same time as when the world's first Turing complete computer was finished in Dec 1945 is a coincidence just as the fundamentals of our universe behaving similar to how we design virtual worlds for state tracking around free agent interactions could also be a coincidence - I find this to be diminishingly probable with each passing week.
That said, while it resolves the existential dread around death (the whole promise of the ancient text is that understanding what it says means knowing you won't taste death), it brings up a whole host of additional existential crises in its place (the text also promises that understanding it will lead to being disturbed).
TL;DR Maybe juggling existential crises is a necessary component of indulging in the self-awareness of one's own existence.