If it works as proposed, that is to say that the price of BitUSD, BitBTC and BitGLD are 100% correlated to the prices of the real assets from which they derive their value, then I suspect that bitshares will take most if not all of BTC's current market cap which is currently at $6.5 billion and falling. All bitshares needs is to rise to a $4 billion dollar market cap for each share to be $1000 a piece.
Additionally, because bitshares x allows people to hold value in stable assets, people can actually use bitAssets as currencies. Today there is less than 1 btc transaction per second, when the network can accommodate 7 tps. I expect that transaction volume on bitshares will reach this 7 tps limit at which point the developers will have to construct a faster verification method. Transaction volume demonstrates the utitlity of the networks which should be positively correlated to the price of the underlying currency of the network.
One also has to account for the community behind bitshares that is already present in china. I don't think that any of the competing second generation blockchain network can boast the same presence in the country that undoubtedly lead to the greatest rise in btc price. From a regulatory perspective even if nations, such as China, that are weary of allowing their citizens to use crypto currencies they will no longer be able to make the claim that volatility in prices makes them a terrible investment.
Lastly, it seems that some people have neglected the central premise of this DAC, which is that serves a decentralized exchange systems. I can sell bts for bitUSD or bitGLD and lock in any profits that I have made without selling my bts for physical dollars or gold. If this experiment is successful that price that people are willing to sell their bts will be very high relative to what individuals were willing to sell bitcoin for throughout its early adoption.
I for one plan on shorting as many bitAssets as possible to accumulate more bitshares and I do not plan on selling any of my bitshares until the market cap exceeds $20 billion.