I think that's gonna depend heavily on your definition of particle. It seems most likely that our current universe is a singularity, a single point that contai

I think that's gonna depend heavily on your definition of particle. It seems most likely that our current universe is a singularity, a single point that contains the entirety of space and time, such as they are. Viewed through a certain lens this could be considered a particle, but I'm not sure that it checks all the boxes for properties you associate with one.