I think parent is advocating doing folding@home over stuff like PoW crypto since the former advances science and the latter (handwaves vaguely) doesn't.
Unless someone manages to turn out a hash collision or an all-zeros hash (spoiler: they won’t), there is absolutely no scientific value in the PoW process itself. (Whether the resulting cryptocurrency has scientific value is left as an exercise to the reader).
see: https://foldingathome.org/