Steem is meant to be tied to the USD dollar, it has money creation built into the platform through curation so it will cause inflation. If more members continually join steemit well then thats fine because of growth, its when the growth of users stop flooding to steemit is when we may see the price drop dramatically... and once the price drops a lot of people will stop using steem because it wont be worth their time. I think will continue to see this cycle happen, more improvements still need to be made to stabilise steem dollar price.