Hi, I like the website and this project seems very interesting and promising.
But I read the white paper and still can't understand the difference between Steem coins and Steem Dollar coins.
Also, if I understand it correctly you can mine the steem coin?

The circulating supply is 234,214,658 STEEM, is there a maximum ?

And also, if there are more and more users will the STEEM price go up or the price has to be equal to a dollar in the long term?

Because I believe in Steemit and I would like to invest in Steem coins if there is a chance that prices go up.
I tried to find the answers by myself but I'm like kinda new to crypto and the $STEEM seems to be different than BTC, ETH ...
Thanks for answering me