If there is a huge demand the price will increase speedily , the quantity also may be increased too. However, this seems someway impossible as SBD is not designed to satisfy demands. Steemit's blockchain prints (creates) it for users for rewards. How much is created depends on how valuable the whole blockchain is.
The Steem price-peg mechanism works with an internal exchange for Steem and Steem dollar. The peg held quite well at least for some time. Traders have incentives to trade close to the peg. But they may have different experiences with other exchanges, at least a year ago when most trades for SD were made with Bitcoin in other exchange platforms. But this will create a significant degree of uncertainty for traders, so in the long run, the peg should hold or at least keep the value of Steem and SBD relatively closer to a US dollar. and this also seem very impossible..
to the best of my knowledge, it's a better gain to the USD. the price hike is a bonus for many Steemer's. Like most, I don’t just the blogging on steemit, i also love trading it too, as there is a lot of profit from that end.
