Yeah we can only do the math on it. I've heard 8 times, and some unconfirmed human getting to 15. Who knows maybe one day we'll have some tech that could get to it. For now we have the theoretical math, but it is sound and plausible (if we can get beyond those physical constraints). Bitcoin has some theoretical limits too, even though those could be far above where we are now. For example when every single asset has been sold for Bitcoin, people still need a house to cover their heads so the up forever is theoretically sound, but we have pragmatic constraints. So from a pragmatic perspective we can say it's going up "forever, Laura(sort of)."