SBD apparently is supposed to be pegged to 1 USD but the market decides the price which is around $6.24
Steems price also is decided by the market, if there are more smart media tokens, kinda like icos, using the steem blockchain, if we grow to millions of users, and if theres new ways to burn steem for whatever purpose, then I can easily see steem going to $100...SBD though is confusing to me lol but who knows maybe the price of that can go just as high
check out https://steemd.com and you will see the overview of the chain and the economics, there is a price feed being updated by the witnesses that calculates the rewards, the SBD is supposed to be pegged to a dollar and that is how the rewards are calculated, the system doesn't know it's being traded at 6USD outside and if it was the whole math would be different, but it is what it is .... quite sad