You still haven't explained how the staking will work at all.

I buy 100 coins, so I give someone (you/escrow/who cares) $100. Then the coin stakes, I have more than 100 coins, but you/escrow/who cares only has $100 so the "floor" is not valid anymore.

How is this going to work? Presumably there will be merchants accepting the coin, how will they get the $1 per coin? do they have to go to my escrow? If they go to you with coins, are you going to give them money that someone else gave you? Now you are short dollars that way.

What is your plan for you and/or your escrows to earn $1 for every coin that is staked, because there is no $1 floor unless you have that.