Thanks for your clarification and suggestions @nnnarvaez.

SBD should float 1 to 1 to the USD to encourage ecommerce. However SBD price peg to USD was broken in the past, therefore would be interesting to understand how Steem blockchain try to peg to USD to find some mechanism to keep the price peg.

Moreover SBD could be an interesting competitor for stablecoins.

In conclusion, I'll update the post but I should read again the whitepaper. The conceptual framework is right there and deserves a deep understanding, specially the economics section.