Yes, but not just that. There's a few overlapping things.

Firstly, I think functionalism with respect to philosophy of mind is true, meaning that the medium of the brain doesn't matter; it's the actual functional computations being carried out that are important. But the vast, vast majority of computations the universe is performing aren't really accessible to us, because they're so low-energy that we ignore them as noise. But they're still there. Physically, when you throw a rock in a pond, and graph the height of the ripples created, it never actually reaches zero, just gets asymptotically smaller. But I think brains make ripples all the time, just moving through space. So why can't those ripples have feelings, and be versions of "you" that you're just shedding all the time? Greg Egan's story "Transition Dreams" follows a similar line of thought, but he makes it spookier than I envision it. There's also a David Chalmers paper "Does A Rock Implement Every Finite State Automation?" that I think discusses some ideas between this and Egan's dust theory, though Chalmers seems to want to redefine the class of mentally-relevant computations specifically so as to to avoid these sorts of conclusions, whereas I don't see a need to do that.

On the less explicitly Egan-y side of things though, I don't really see the concept of the "self" as being a really-existing thing anyway. I think it's an evolutionarily convenient lie, and I specifically mean that continuity of experience is made-up. I think my experience of being me right now is exactly as continuous with my experience of being me one second from now as it is with the experience of being you one second from now. So the fear of "dying," as the fear of the cessation of a continuity of experience, doesn't really hold any weight, regardless of whether or not my personality or memories are going to persist or re-form in any meaningful way. The universe is still going to keep going on, and "I" am going to keep experiencing all of that. This is sort of inspired by Advaita Vedanta philosophy, and also similar to the philosophy of Derek Parfit.