Sound money is to Bitcoin what pokes were to Facebook, or the telegraph to electricity. It grows bigger than that, but it hasn't reached critical mass nor momentum yet. Bitcoin is way stronger than Ethereum, because of better and stronger decentralisation and stability.
Always enjoy your astute comments Mr. Bennaim. What do you think are “next levels” beyond Sound Money? Are you talking about computational markets, Layer-2/-3 solutions, sidechains et al? or even something more esoteric?