I disagree with this completely.  Bid/Ask is a function of the market's supply/demand and it is the current price one can buy/sell at.  If I want to buy a coin/token that has very few holders and doesn't trade on major exchanges I can do so, selling is difficult, but that is the nature of buying something that does not have much demand and is thinly traded.  Your are trying to solve for illiquid assets, but are phrasing it in terms of coincidence of wants which is incorrect.  And with altcoins/tokens it typically is not supply which is an issue as there are millions of coins issued in each instance.  The issue is purely demand.  You are trying to create demand via a derivative mechanism.  This will only be useful though to those coins/tokens that can't support demand on their own and as there is no real demand for the coins/tokens themselves you are creating a way for those who own them to extract some value out of the derivative portion (i.e. reserves) which almost everyone will do as the coins/tokens cannot stand on their own.