Well, it's still at almost $8, so it might even keep on growing in the next days. I really don't see any downsides to this; those of us that blog and comment on the blockchain get paid more if we convert our SBD to STEEM, while those who for some reason wants to have a lot of SBD might end up losing money if it fall. However, for us writers and content creators, it's only good news :)