I'm sticking with the most obvious idea of that someone saw a low volume market not knowing what it was and every since people have started to FOMO. Steem get's pumped because it's associated with SBD's creating small FOMO there.

Finally, I'm just sticking with the fact of common sense and crypto do not go hand in hand when trading so the only thing you can count on in trading is the fact that what will happen is what you absolutely think won't happen.