That's not my point. My point is if you have $100,000 in SBD but no one wants to buy your SBD then you're stuck. You convert your SBD to Steem? Okay so now you're dumping Steem and the price goes down for everyone which means your future SBD payments also go down if you've powered down or if you're blogging.
So I guess you're not getting my point. The more people have to convert to Steem from SBD, the less SBD people get from blogging or from their Steem. That means you can look forward to lower amounts in fiat as the price of Steem collapses from bloggers cashing out by selling SBD to get Steem to dump Steem. Ideally it would be better if people would just buy the SBD and use the SBD as a currency, not because Steem is primarily about trying to be a currency but because if there is no demand for SBD then why payout in SBD at all? Just payout in Steem because at least there is demand for Steem for now.
If you are really smart you'll hold your SBD just in case the price of Steem collapses because then when you convert you can get more Steem Power the lower the price of Steem gets.
The issue is the market cap for Steem is what determines what bloggers get paid. As more bloggers join and if the market cap tanks because bloggers have to sell Steem faster than anyone can buy it, then the payouts could also decrease until at some point an equilibrium is reached but this could be extremely volatile and avoidable