The original reason that SBD was created was to create a crypto that was pegged to the USD. For most of Steemit's history, it was close to $1 USD.

Last winter when all of the crypto markets peaked it jumped up overnight to $12-15 and surprised everyone. So I think it will come back to close to $1 again. There is also talk of doing away with it entirely and we will have to see if that ever happens. Only time will tell.