Even if it’s just Earth, if we assume there is a degree of randomness in species assignment then you’ve got decent odds of reincarnating as an ant:
We conservatively estimate total abundance of ground-dwelling ants at over 3 × 1015 and estimate the number of all ants on Earth to be almost 20 × 1015 individuals.1
And of course, massively high odds of being a bacteria. There are probably ~40 trillion bacteria living just in your body right now:
They estimate that the range of bacterial cells goes from about 30 to 50 trillion in each individual. 2
Even if it’s just Earth, if we assume there is a degree of randomness in species assignment then you’ve got decent odds of reincarnating as an ant:
And of course, massively high odds of being a bacteria. There are probably ~40 trillion bacteria living just in your body right now:
Now add the ocean. Yeah, we all spend billions of years coming back as bacteria