You want to know what puts downward pressure on STEEM and SBD prices?
Check these:
https://steemit.com/steemit/@stimialiti/to-dan-ned-the-witnesses-and-to-everyone-invested-in-this-platform-to-save-steemit-this-is-what-you-should-do
And of course Dan and Ned liquidating their stake because they know its future direction do not help much to raise STEEM prices, nor does its inherent inflation.
Also, people like craig-grant looking to get out, no blame and no shame on him about this one.