I assume very few will just trade steem due to its inflation rate.

That was my thought as well. It's going to be interesting to see what the market can bare over time. I'm also realizing how nice of a "holding" place SBD is and/or converting SBD to STEEM through the 7 day process (initiating that 7 day smart contract) and then potentially selling on the market back to SBD to start the process again.